[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.71,0:00:02.80,Default,,0000,0000,0000,,Sve sa cime smo se do sada\Nsusreli na nasem
Dialogue: 0,0:00:02.86,0:00:04.62,Default,,0000,0000,0000,,proputovanju kroz \Nhemiju se vrtelo
Dialogue: 0,0:00:04.64,0:00:07.35,Default,,0000,0000,0000,,oko stabilnosti elektrona \Ni gde bi se oni radije
Dialogue: 0,0:00:07.57,0:00:10.34,Default,,0000,0000,0000,,nasli u stabilnom omotacu.
Dialogue: 0,0:00:10.34,0:00:14.03,Default,,0000,0000,0000,,I kao sve u zivotu, ako \Nproucite atom malo
Dialogue: 0,0:00:14.03,0:00:16.74,Default,,0000,0000,0000,,detaljnije, shvaticete da \Nelektroni nisu jedina stvar
Dialogue: 0,0:00:16.75,0:00:19.25,Default,,0000,0000,0000,,koja ima neku dinamiku u atomu.
Dialogue: 0,0:00:19.25,0:00:24.25,Default,,0000,0000,0000,,Nego da i u jezgru \Npostoje neke interakcije,
Dialogue: 0,0:00:24.25,0:00:27.14,Default,,0000,0000,0000,,postoji neka nestabilnost, koja \Ntreba nekako da se razresi.
Dialogue: 0,0:00:27.14,0:00:28.74,Default,,0000,0000,0000,,O tome cemo malo da
Dialogue: 0,0:00:28.74,0:00:31.42,Default,,0000,0000,0000,,pricamo u ovom videu.
Dialogue: 0,0:00:31.42,0:00:35.11,Default,,0000,0000,0000,,U stvari mehanizam tog procesa \Nprevazilazi program
Dialogue: 0,0:00:35.11,0:00:37.45,Default,,0000,0000,0000,,prve godine hemije, \Nali je dobro
Dialogue: 0,0:00:37.45,0:00:39.57,Default,,0000,0000,0000,,makar znati da on postoji.
Dialogue: 0,0:00:39.57,0:00:43.11,Default,,0000,0000,0000,,I jednog dana kad budemo ucili \Njaku nuklearnu silu
Dialogue: 0,0:00:43.11,0:00:45.57,Default,,0000,0000,0000,,kvantnu fiziku i te stvari, \Nonda mozemo poceti
Dialogue: 0,0:00:45.57,0:00:49.28,Default,,0000,0000,0000,,da pricamo o tome zasto \Novi protoni i neutroni,
Dialogue: 0,0:00:49.28,0:00:52.17,Default,,0000,0000,0000,,i kvarkovi koji ih cine, \Nimaju medjusobne
Dialogue: 0,0:00:52.17,0:00:53.53,Default,,0000,0000,0000,,interakcije\Nkakve imaju.
Dialogue: 0,0:00:53.53,0:00:55.50,Default,,0000,0000,0000,,Za sada, hajde da bar \Npricamo o
Dialogue: 0,0:00:55.50,0:01:00.89,Default,,0000,0000,0000,,razlicitim nacinima na koje \Njezgro moze da se raspadne.
Dialogue: 0,0:01:00.89,0:01:03.88,Default,,0000,0000,0000,,Recimo da imam gomilu protona.
Dialogue: 0,0:01:03.88,0:01:06.83,Default,,0000,0000,0000,,Nacrtacu nekoliko ovde.
Dialogue: 0,0:01:06.83,0:01:09.59,Default,,0000,0000,0000,,Evo nekoliko protona, \Na nacrtacu i par neutrona.
Dialogue: 0,0:01:09.59,0:01:13.43,Default,,0000,0000,0000,,Nacrtacu ih u nekoj neutralnoj boji.
Dialogue: 0,0:01:13.43,0:01:16.78,Default,,0000,0000,0000,,Mozda, da vidim, neka sivkasta \Nbi bila dobra.
Dialogue: 0,0:01:16.78,0:01:21.27,Default,,0000,0000,0000,,I hajde da nacrtamo \Npar neutrona ovde.
Dialogue: 0,0:01:21.27,0:01:22.51,Default,,0000,0000,0000,,Koliko protona imam?
Dialogue: 0,0:01:22.51,0:01:24.30,Default,,0000,0000,0000,,1, 2, 3, 4, 5, 6, 7, 8.
Dialogue: 0,0:01:24.30,0:01:32.41,Default,,0000,0000,0000,,Nacrtacu 1, 2, 3, 4, 5, \N6, 7, 8, 9 neutrona.
Dialogue: 0,0:01:32.41,0:01:34.87,Default,,0000,0000,0000,,I hajde da kazemo da je \Novo jezgro naseg atoma.
Dialogue: 0,0:01:34.87,0:01:36.96,Default,,0000,0000,0000,,I zapamtite - ovo je, \Nje li, u prvom
Dialogue: 0,0:01:36.96,0:01:39.86,Default,,0000,0000,0000,,videu koji sam napravio o atomu - \Njezgro; ako
Dialogue: 0,0:01:39.86,0:01:43.32,Default,,0000,0000,0000,,biste trebali da nacrtate \Npravi atom - vrlo je tesko
Dialogue: 0,0:01:43.32,0:01:45.44,Default,,0000,0000,0000,,nacrtati atom, posto\Nnema definisane granice.
Dialogue: 0,0:01:45.44,0:01:49.05,Default,,0000,0000,0000,,Elektron bi mogao da se nadje, je li, \Nu bilo kom momentu
Dialogue: 0,0:01:49.36,0:01:51.27,Default,,0000,0000,0000,,mogao bi biti bilo gde. \NAko kazemo
Dialogue: 0,0:01:51.27,0:01:52.74,Default,,0000,0000,0000,,OK, gde ce elektron
Dialogue: 0,0:01:52.74,0:01:53.70,Default,,0000,0000,0000,,biti 90%\Nvremena?
Dialogue: 0,0:01:53.70,0:01:55.68,Default,,0000,0000,0000,,Recimo da je ovo je \Nradijus, ili to je
Dialogue: 0,0:01:55.68,0:01:57.75,Default,,0000,0000,0000,,precnik naseg atoma.
Dialogue: 0,0:01:57.75,0:02:00.53,Default,,0000,0000,0000,,Naucili smo u prvom videu \Nda jezgro zauzima
Dialogue: 0,0:02:00.53,0:02:05.45,Default,,0000,0000,0000,,skoro nemerljivo \Nmali deo zapremine ove
Dialogue: 0,0:02:05.45,0:02:08.34,Default,,0000,0000,0000,,sfere gde ce se \Nelektron naci 90% vremena.
Dialogue: 0,0:02:08.34,0:02:12.08,Default,,0000,0000,0000,,I interesantna stvar koju smo tada \Nnaucili je da, eto, uglavnom
Dialogue: 0,0:02:12.08,0:02:15.28,Default,,0000,0000,0000,,sve sto oko sebe vidimo, \Nje vecinom samo prazan prostor.
Dialogue: 0,0:02:15.28,0:02:17.03,Default,,0000,0000,0000,,Sve ovo je samo \Nprazan prostor.
Dialogue: 0,0:02:17.03,0:02:19.40,Default,,0000,0000,0000,,I samo hocu da ponovim, \Nposto je ta izuzetno mala
Dialogue: 0,0:02:19.40,0:02:23.66,Default,,0000,0000,0000,,tacka o kojoj smo \Nranije govorili,
Dialogue: 0,0:02:23.66,0:02:26.32,Default,,0000,0000,0000,,iako je to samo veoma \Nmaleni deo zapremine
Dialogue: 0,0:02:26.32,0:02:29.03,Default,,0000,0000,0000,,atoma - ona zapravo predstavlja \Nskoro svu njegovu masu -
Dialogue: 0,0:02:29.03,0:02:31.89,Default,,0000,0000,0000,,to je ono sto sam ovde zumirao.
Dialogue: 0,0:02:31.89,0:02:34.24,Default,,0000,0000,0000,,Ovo nisu atomi, nisu elektroni.
Dialogue: 0,0:02:34.24,0:02:36.58,Default,,0000,0000,0000,,Ovo je zumirano jezgro.
Dialogue: 0,0:02:36.58,0:02:39.27,Default,,0000,0000,0000,,I tako, desava se da je nekad jezgro
Dialogue: 0,0:02:39.55,0:02:42.74,Default,,0000,0000,0000,,pomalo nestabilno, i\Nonda tezi da dostigne
Dialogue: 0,0:02:43.09,0:02:44.40,Default,,0000,0000,0000,,stabilniju konfiguraciju.
Dialogue: 0,0:02:44.40,0:02:46.60,Default,,0000,0000,0000,,Necemo se upustati u detalje \No tome sta tacno
Dialogue: 0,0:02:46.60,0:02:48.70,Default,,0000,0000,0000,,definise nestabilno jezgro \Ni sve to.
Dialogue: 0,0:02:48.70,0:02:51.88,Default,,0000,0000,0000,,Ali kad pricamo o \Nnestabilnom jezgru,
Dialogue: 0,0:02:51.88,0:02:55.82,Default,,0000,0000,0000,,ono ponekad emituje nesto \Nsto se zove alfa-cestica,
Dialogue: 0,0:02:55.82,0:02:58.47,Default,,0000,0000,0000,,ili se kaze da je ovo \Nalfa-raspad.
Dialogue: 0,0:02:58.47,0:03:04.44,Default,,0000,0000,0000,,Alfa raspad.
Dialogue: 0,0:03:04.44,0:03:06.22,Default,,0000,0000,0000,,I jezgro emituje alfa cesticu,
Dialogue: 0,0:03:06.22,0:03:09.16,Default,,0000,0000,0000,,sto zvuci jako fensi.
Dialogue: 0,0:03:09.16,0:03:12.45,Default,,0000,0000,0000,,To je samo skup \Nneutrona i protona.
Dialogue: 0,0:03:12.45,0:03:16.69,Default,,0000,0000,0000,,Znaci alfa cestica je skup \Ndva neutrona i dva protona.
Dialogue: 0,0:03:16.69,0:03:20.85,Default,,0000,0000,0000,,Mozda ovi ovde, oni jednostavno \Nnisu osecali da se bas uklapaju
Dialogue: 0,0:03:20.85,0:03:25.11,Default,,0000,0000,0000,,dobro ovde... \Noni su ova grupa ovde.
Dialogue: 0,0:03:25.11,0:03:27.74,Default,,0000,0000,0000,,I oni bivaju emitovani.
Dialogue: 0,0:03:27.74,0:03:30.07,Default,,0000,0000,0000,,Napustaju jezgro.
Dialogue: 0,0:03:30.07,0:03:33.87,Default,,0000,0000,0000,,Dakle, hajde da razmislimo \Nsta se desi sa atomom kada
Dialogue: 0,0:03:33.87,0:03:36.05,Default,,0000,0000,0000,,se ovako nesto dogodi.
Dialogue: 0,0:03:36.05,0:03:38.50,Default,,0000,0000,0000,,Hajde da izaberemo nasumice \Nneki element. Da kazemo
Dialogue: 0,0:03:38.50,0:03:40.31,Default,,0000,0000,0000,,da je to element E.
Dialogue: 0,0:03:40.31,0:03:43.02,Default,,0000,0000,0000,,I da kazemo da on ima \Np protona.
Dialogue: 0,0:03:43.02,0:03:45.66,Default,,0000,0000,0000,,Ustvari, daj da ih nacrtam \Nu boji mojih protona.
Dialogue: 0,0:03:45.66,0:03:47.80,Default,,0000,0000,0000,,Ima p protona.
Dialogue: 0,0:03:47.80,0:03:51.55,Default,,0000,0000,0000,,I ima maseni broj, sto je broj
Dialogue: 0,0:03:51.55,0:03:55.51,Default,,0000,0000,0000,,protona plus broj neutrona.
Dialogue: 0,0:03:55.51,0:03:59.48,Default,,0000,0000,0000,,I nacrtacemo neutrone \Nsivom, je li?
Dialogue: 0,0:03:59.48,0:04:06.59,Default,,0000,0000,0000,,I tako, kad dozivi alfa raspad, \Nsta ce se
Dialogue: 0,0:04:06.59,0:04:08.18,Default,,0000,0000,0000,,desiti sa elementom?
Dialogue: 0,0:04:08.18,0:04:11.89,Default,,0000,0000,0000,,Pa, broj protona ce mu \Nse smanjiti za dva.
Dialogue: 0,0:04:11.89,0:04:16.04,Default,,0000,0000,0000,,Znaci, broj protona bice \Np minus 2.
Dialogue: 0,0:04:16.04,0:04:19.45,Default,,0000,0000,0000,,A i broj neutrona \Nce se smanjiti za 2.
Dialogue: 0,0:04:19.45,0:04:21.32,Default,,0000,0000,0000,,Znaci maseni broj ce se \Nsmanjiti za 4.
Dialogue: 0,0:04:21.32,0:04:27.10,Default,,0000,0000,0000,,Znaci ovde gore imacemo p minus 2, \Nplus nasi neutroni minus 2,
Dialogue: 0,0:04:27.10,0:04:28.94,Default,,0000,0000,0000,,znaci imacemo minus 4.
Dialogue: 0,0:04:28.94,0:04:31.08,Default,,0000,0000,0000,,Znaci masa ce se \Nsmanjiti za 4, i zapravo
Dialogue: 0,0:04:31.08,0:04:32.70,Default,,0000,0000,0000,,ce se pretvoriti \Nu novi element.
Dialogue: 0,0:04:32.70,0:04:34.71,Default,,0000,0000,0000,,Zapamtite, elemente definise
Dialogue: 0,0:04:34.71,0:04:36.25,Default,,0000,0000,0000,,broj protona.
Dialogue: 0,0:04:36.25,0:04:40.63,Default,,0000,0000,0000,,U ovom alfa raspadu, \Nkad gubite 2 neutrona i
Dialogue: 0,0:04:40.63,0:04:43.30,Default,,0000,0000,0000,,2 protona, ali narocito protoni \Nce da vas pretvore
Dialogue: 0,0:04:43.30,0:04:44.46,Default,,0000,0000,0000,,u novi element.
Dialogue: 0,0:04:44.46,0:04:46.86,Default,,0000,0000,0000,,Pa ako ovo zovemo elementom 1, \Ntako cu ga zvati,
Dialogue: 0,0:04:46.86,0:04:50.59,Default,,0000,0000,0000,,sada cemo biti novi element , \Nelement 2.
Dialogue: 0,0:04:50.59,0:04:54.05,Default,,0000,0000,0000,,I ako razmislite sta je stvoreno, \Nemitujemo nesto
Dialogue: 0,0:04:54.05,0:04:58.60,Default,,0000,0000,0000,,sto ima dva protona,
Dialogue: 0,0:04:58.60,0:05:00.34,Default,,0000,0000,0000,,i ima dva neutrona.
Dialogue: 0,0:05:00.34,0:05:02.74,Default,,0000,0000,0000,,Njegova masa bice \Nmasa dva protona
Dialogue: 0,0:05:02.74,0:05:04.79,Default,,0000,0000,0000,,i dva neutrona.
Dialogue: 0,0:05:04.79,0:05:05.83,Default,,0000,0000,0000,,I sta smo emitovali?
Dialogue: 0,0:05:05.83,0:05:09.81,Default,,0000,0000,0000,,Emitovali smo nesto \Nsto ima maseni broj 4.
Dialogue: 0,0:05:09.81,0:05:12.17,Default,,0000,0000,0000,,Ako pogledate, sta ima \N2 protona i 2 neutrona?
Dialogue: 0,0:05:12.17,0:05:13.22,Default,,0000,0000,0000,,U stvari nemam
Dialogue: 0,0:05:13.22,0:05:13.98,Default,,0000,0000,0000,,periodni sistem
Dialogue: 0,0:05:13.98,0:05:16.25,Default,,0000,0000,0000,,zaboravio sam da ga\Npostavim ovde.
Dialogue: 0,0:05:16.26,0:05:19.40,Default,,0000,0000,0000,,Ali ne treba vam dugo da\Nu periodnom sistemu nadjete
Dialogue: 0,0:05:19.40,0:05:22.93,Default,,0000,0000,0000,,element koji ima 2 protona, \Ni to je helijum.
Dialogue: 0,0:05:22.93,0:05:25.64,Default,,0000,0000,0000,,On zaista ima maseni broj 4.
Dialogue: 0,0:05:25.65,0:05:28.19,Default,,0000,0000,0000,,Znaci u stvari se \Nemituje jezgro helijuma
Dialogue: 0,0:05:28.19,0:05:30.43,Default,,0000,0000,0000,,pri alfa raspadu.
Dialogue: 0,0:05:30.43,0:05:33.24,Default,,0000,0000,0000,,Ovo je zapravo jezgro helijuma.
Dialogue: 0,0:05:33.54,0:05:34.88,Default,,0000,0000,0000,,jezgro helijuma
Dialogue: 0,0:05:35.12,0:05:38.14,Default,,0000,0000,0000,,I posto je to jezgro helijuma, \Nkoje nema elektrone
Dialogue: 0,0:05:38.14,0:05:41.45,Default,,0000,0000,0000,,da uravnoteze \Nta dva protona,
Dialogue: 0,0:05:41.49,0:05:44.44,Default,,0000,0000,0000,,ovo je zapravo \Njon helijuma.
Dialogue: 0,0:05:44.57,0:05:48.38,Default,,0000,0000,0000,,Znaci prakticno \Nnema elektrone.
Dialogue: 0,0:05:48.43,0:05:52.16,Default,,0000,0000,0000,,Ima 2 protona, i\Nnaelektrisanje mu je 2+.
Dialogue: 0,0:05:53.27,0:05:57.94,Default,,0000,0000,0000,,Dakle alfa cestica je ustvari\Njon helijuma, dvostruko
Dialogue: 0,0:05:57.97,0:06:00.51,Default,,0000,0000,0000,,pozitivno naelektrisan \Njon helijuma koje jezgro
Dialogue: 0,0:06:00.51,0:06:05.38,Default,,0000,0000,0000,,spontano emituje, da bi \Ndostiglo stabilnije stanje.
Dialogue: 0,0:06:05.38,0:06:07.95,Default,,0000,0000,0000,,To je jedna vrsta raspada.
Dialogue: 0,0:06:07.95,0:06:10.13,Default,,0000,0000,0000,,Hajde da istrazimo ostale.
Dialogue: 0,0:06:10.13,0:06:13.39,Default,,0000,0000,0000,,Hajde da nacrtamo \Njos jedno jezgro ovde.
Dialogue: 0,0:06:14.86,0:06:18.15,Default,,0000,0000,0000,,Nacrtacu nekoliko neutrona.
Dialogue: 0,0:06:18.95,0:06:22.41,Default,,0000,0000,0000,,I nacrtacu nekoliko protona.
Dialogue: 0,0:06:24.16,0:06:28.20,Default,,0000,0000,0000,,Nekad se desi da je \Nneutronu neprijatno
Dialogue: 0,0:06:28.20,0:06:29.83,Default,,0000,0000,0000,,sa samim sobom.
Dialogue: 0,0:06:29.83,0:06:33.25,Default,,0000,0000,0000,,Gleda sta rade protoni \Niz dana u dan, i kaze
Dialogue: 0,0:06:33.29,0:06:34.75,Default,,0000,0000,0000,,znate sta? Iz nekog
Dialogue: 0,0:06:34.76,0:06:36.57,Default,,0000,0000,0000,,razloga, kad ze\Nzagledam u svoje srce
Dialogue: 0,0:06:36.57,0:06:38.66,Default,,0000,0000,0000,,osecam da bih u stvari \Ntrebao biti proton.
Dialogue: 0,0:06:38.70,0:06:41.43,Default,,0000,0000,0000,,Kada bih bio proton, \Ncelo jezgro bi
Dialogue: 0,0:06:41.43,0:06:43.63,Default,,0000,0000,0000,,bilo malko stabilnije.
Dialogue: 0,0:06:43.66,0:06:46.26,Default,,0000,0000,0000,,I tako, da bi postao proton - \Nsetite se,
Dialogue: 0,0:06:46.26,0:06:49.54,Default,,0000,0000,0000,,neutron ima neutralno naelektrisanje.
Dialogue: 0,0:06:49.55,0:06:52.28,Default,,0000,0000,0000,,I sta on uradi - emituje elektron.\NZnam da sad
Dialogue: 0,0:06:52.30,0:06:53.91,Default,,0000,0000,0000,,kazete - Sal, znas\Nto je blesavo,
Dialogue: 0,0:06:53.91,0:06:55.60,Default,,0000,0000,0000,,nisam ni znao/la \Nda neutroni imaju
Dialogue: 0,0:06:55.60,0:06:56.95,Default,,0000,0000,0000,,elektrone u sebi, i to.
Dialogue: 0,0:06:56.95,0:06:58.38,Default,,0000,0000,0000,,I ja se slazem sa vama.
Dialogue: 0,0:06:58.38,0:06:59.56,Default,,0000,0000,0000,,Jeste blesavo.
Dialogue: 0,0:06:59.56,0:07:01.46,Default,,0000,0000,0000,,I jednog dana cemo \Nuciti o svemu sto
Dialogue: 0,0:07:01.46,0:07:03.34,Default,,0000,0000,0000,,postoji unutar jezgra.\NZa sada
Dialogue: 0,0:07:03.36,0:07:04.99,Default,,0000,0000,0000,,hajde samo da\Nkazemo da on moze
Dialogue: 0,0:07:05.00,0:07:10.16,Default,,0000,0000,0000,,da emituje elektrone. \NTako se ovde
Dialogue: 0,0:07:10.16,0:07:12.52,Default,,0000,0000,0000,,emituje elektron....\Nemituje elektron
Dialogue: 0,0:07:12.54,0:07:15.22,Default,,0000,0000,0000,,I to oznacavamo sa - \Ngrubo, njegova masa je nula.
Dialogue: 0,0:07:15.22,0:07:17.50,Default,,0000,0000,0000,,Znamo da elektron \Nzapravo nema masu nula,
Dialogue: 0,0:07:17.60,0:07:19.77,Default,,0000,0000,0000,,ali ovde govorimo \No masenom broju.
Dialogue: 0,0:07:19.87,0:07:24.76,Default,,0000,0000,0000,,Ako je proton jedan, \Nelektron je 1/1,836 deo toga.
Dialogue: 0,0:07:24.76,0:07:26.42,Default,,0000,0000,0000,,Kada zaokruzimo\Nkazemo
Dialogue: 0,0:07:26.42,0:07:27.43,Default,,0000,0000,0000,,da mu je\Nmasa nula.
Dialogue: 0,0:07:27.46,0:07:28.92,Default,,0000,0000,0000,,Masa mu nije zaista nula.
Dialogue: 0,0:07:28.92,0:07:32.03,Default,,0000,0000,0000,,A naelektrisanje mu je \Nminus 1. Atomski
Dialogue: 0,0:07:32.21,0:07:33.66,Default,,0000,0000,0000,,broj mu je, \Nmozemo reci da
Dialogue: 0,0:07:33.66,0:07:35.38,Default,,0000,0000,0000,,mu je kao \Natomski broj minus 1.
Dialogue: 0,0:07:35.40,0:07:37.62,Default,,0000,0000,0000,,Znaci emituje elektron.
Dialogue: 0,0:07:37.62,0:07:40.06,Default,,0000,0000,0000,,Emisijom elektrona, \Numesto da bude neutralan
Dialogue: 0,0:07:40.14,0:07:42.98,Default,,0000,0000,0000,,sada prelazi u proton.
Dialogue: 0,0:07:44.54,0:07:47.15,Default,,0000,0000,0000,,Ovo se zove beta raspad.
Dialogue: 0,0:07:49.10,0:07:51.31,Default,,0000,0000,0000,,Beta raspad.
Dialogue: 0,0:07:52.60,0:07:55.72,Default,,0000,0000,0000,,A beta cestica je ustvari \Nsamo taj emitovani elektron.
Dialogue: 0,0:07:56.53,0:08:00.24,Default,,0000,0000,0000,,Hajde da se vratimo \Nslucaju naseg elementa.
Dialogue: 0,0:08:00.24,0:08:04.07,Default,,0000,0000,0000,,Koji ima odredjen broj protona, i ima
Dialogue: 0,0:08:04.07,0:08:06.50,Default,,0000,0000,0000,,odredjen broj neutrona.
Dialogue: 0,0:08:06.50,0:08:08.40,Default,,0000,0000,0000,,Znaci imate protone i neutrone, i tako
Dialogue: 0,0:08:08.40,0:08:09.97,Default,,0000,0000,0000,,znate maseni broj.
Dialogue: 0,0:08:09.97,0:08:12.88,Default,,0000,0000,0000,,Kada element podlegne \Nbeta raspadu, sta se desi?
Dialogue: 0,0:08:13.18,0:08:15.53,Default,,0000,0000,0000,,Da li se broj protona menja?
Dialogue: 0,0:08:15.68,0:08:18.54,Default,,0000,0000,0000,,Naravno, imamo jedan vise \Nproton nego ranije.
Dialogue: 0,0:08:18.69,0:08:20.73,Default,,0000,0000,0000,,Jer nam se neutron \Npretvorio u proton.
Dialogue: 0,0:08:20.73,0:08:23.64,Default,,0000,0000,0000,,Znaci sad imamo protone +1.
Dialogue: 0,0:08:23.64,0:08:25.70,Default,,0000,0000,0000,,Da li nam se maseni broj promenio?
Dialogue: 0,0:08:25.70,0:08:26.45,Default,,0000,0000,0000,,Da vidimo.
Dialogue: 0,0:08:26.45,0:08:28.20,Default,,0000,0000,0000,,Neutroni su nam \Nse smanjili za jedan
Dialogue: 0,0:08:28.20,0:08:30.40,Default,,0000,0000,0000,,ali protoni su se \Npovecali za jedan.
Dialogue: 0,0:08:30.40,0:08:32.50,Default,,0000,0000,0000,,Tako da se maseni broj ne menja.
Dialogue: 0,0:08:32.50,0:08:36.58,Default,,0000,0000,0000,,I dalje ce biti p plus N.
Dialogue: 0,0:08:36.71,0:08:39.25,Default,,0000,0000,0000,,Znaci maseni broj ostaje isti, \Nza razliku od
Dialogue: 0,0:08:39.25,0:08:42.64,Default,,0000,0000,0000,,alfa raspada, \Nali se element ipak menja.
Dialogue: 0,0:08:42.64,0:08:44.75,Default,,0000,0000,0000,,Promenio vam se broj protona.
Dialogue: 0,0:08:44.75,0:08:47.65,Default,,0000,0000,0000,,Znaci i sada dobijate \Nnovi element,
Dialogue: 0,0:08:47.65,0:08:49.22,Default,,0000,0000,0000,,pri beta raspadu.
Dialogue: 0,0:08:49.22,0:08:52.28,Default,,0000,0000,0000,,Hajde da kazemo \Nda imamo drugaciju situaciju.
Dialogue: 0,0:08:52.28,0:08:55.90,Default,,0000,0000,0000,,Da kazemo da imamo situaciju \Ngde jedan od protona
Dialogue: 0,0:08:55.90,0:08:59.34,Default,,0000,0000,0000,,gleda neutrone i kaze - znate sta?
Dialogue: 0,0:08:59.34,0:09:01.96,Default,,0000,0000,0000,,Gledam kako zive.
Dialogue: 0,0:09:01.97,0:09:03.92,Default,,0000,0000,0000,,I bas mi se svidja.
Dialogue: 0,0:09:03.92,0:09:09.45,Default,,0000,0000,0000,,Mislim da bih se bolje uklopio, \Ni nasa zajednica
Dialogue: 0,0:09:09.45,0:09:14.92,Default,,0000,0000,0000,,cestica u jezgru \Nbi bila srecnija
Dialogue: 0,0:09:14.92,0:09:17.05,Default,,0000,0000,0000,,kada bih i ja bio neutron.
Dialogue: 0,0:09:17.05,0:09:19.35,Default,,0000,0000,0000,,Svi bismo bili u stabilnijem stanju.
Dialogue: 0,0:09:19.40,0:09:23.17,Default,,0000,0000,0000,,I sta se desi, taj mali \Nsto ne voli da je proton
Dialogue: 0,0:09:23.19,0:09:28.23,Default,,0000,0000,0000,,ima sansu da emituje - \Ni sad je ovo novi koncept
Dialogue: 0,0:09:28.24,0:09:30.70,Default,,0000,0000,0000,,- pozitron, ne proton.
Dialogue: 0,0:09:30.76,0:09:32.47,Default,,0000,0000,0000,,On emituje pozitron.
Dialogue: 0,0:09:32.47,0:09:34.48,Default,,0000,0000,0000,,A sta je pozitron?
Dialogue: 0,0:09:34.48,0:09:36.78,Default,,0000,0000,0000,,To je nesto sto ima identicnu masu
Dialogue: 0,0:09:36.78,0:09:38.53,Default,,0000,0000,0000,,kao elektron.
Dialogue: 0,0:09:38.53,0:09:42.89,Default,,0000,0000,0000,,Znaci, ima 1/1836 deo mase protona.
Dialogue: 0,0:09:42.89,0:09:45.22,Default,,0000,0000,0000,,Ali mi pisemo nulu ovde, \Njer u jedinicama
Dialogue: 0,0:09:45.24,0:09:47.94,Default,,0000,0000,0000,,masenog broja, \Nto je skoro nula.
Dialogue: 0,0:09:48.00,0:09:49.90,Default,,0000,0000,0000,,Ali on ima \Npozitivno naelektrisanje.
Dialogue: 0,0:09:49.90,0:09:51.60,Default,,0000,0000,0000,,I to je malo \Nzbunjujuce, posto se
Dialogue: 0,0:09:51.60,0:09:52.65,Default,,0000,0000,0000,,i dalje pise \N"e" ovde.
Dialogue: 0,0:09:52.65,0:09:54.81,Default,,0000,0000,0000,,Ja kad god vidim "e", \Nja mislim na elektron.
Dialogue: 0,0:09:54.81,0:09:57.40,Default,,0000,0000,0000,,Ali ne, pise se "e" jer je to \Nprakticno ista cestica,
Dialogue: 0,0:09:57.43,0:09:59.07,Default,,0000,0000,0000,,ali koja umesto negativnog
Dialogue: 0,0:09:59.07,0:10:01.28,Default,,0000,0000,0000,,ima pozitivno naelektrisanje.
Dialogue: 0,0:10:01.28,0:10:03.55,Default,,0000,0000,0000,,To je pozitron.
Dialogue: 0,0:10:03.55,0:10:04.46,Default,,0000,0000,0000,,pozitron
Dialogue: 0,0:10:04.46,0:10:07.00,Default,,0000,0000,0000,,I sad vec postajemo pomalo egzoticni
Dialogue: 0,0:10:07.00,0:10:10.35,Default,,0000,0000,0000,,sa tim raznim cesticama \Ni stvarima kojih se doticemo.
Dialogue: 0,0:10:10.35,0:10:12.26,Default,,0000,0000,0000,,Ali ovo se zaista desava.
Dialogue: 0,0:10:12.26,0:10:15.69,Default,,0000,0000,0000,,I ako imate proton \Nkoji emituje ovu cesticu,
Dialogue: 0,0:10:15.71,0:10:18.65,Default,,0000,0000,0000,,koja odnese prakticno sve \Npozitivno naelektrisanje sa sobom,
Dialogue: 0,0:10:18.65,0:10:26.06,Default,,0000,0000,0000,,taj proton se pretvara u neutron.
Dialogue: 0,0:10:26.06,0:10:28.58,Default,,0000,0000,0000,,I to se zove pozitronska emisija.
Dialogue: 0,0:10:28.58,0:10:31.59,Default,,0000,0000,0000,,Obicno je lako shvatiti \Nsta je pozitronska emisija,
Dialogue: 0,0:10:31.59,0:10:33.67,Default,,0000,0000,0000,,jer se zove pozitronska emisija.
Dialogue: 0,0:10:33.67,0:10:38.03,Default,,0000,0000,0000,,Pa ako krenemo od istog E, \Nkoji ima neki broj protona,
Dialogue: 0,0:10:38.03,0:10:40.45,Default,,0000,0000,0000,,i neki broj neutrona
Dialogue: 0,0:10:40.45,0:10:43.58,Default,,0000,0000,0000,,Kakav ce biti novi element?
Dialogue: 0,0:10:43.58,0:10:45.62,Default,,0000,0000,0000,,Pa, izgubice proton, \Np minus 1.
Dialogue: 0,0:10:45.62,0:10:47.62,Default,,0000,0000,0000,,Koji ce se pretvoriti u neutron.
Dialogue: 0,0:10:47.62,0:10:49.48,Default,,0000,0000,0000,,Znaci p ce se smanjiti za jedan.
Dialogue: 0,0:10:49.48,0:10:51.27,Default,,0000,0000,0000,,N ce se povecati za jedan.
Dialogue: 0,0:10:51.27,0:10:55.33,Default,,0000,0000,0000,,Sto znaci da se masa\Ncelog atoma nece promeniti.
Dialogue: 0,0:10:55.33,0:10:57.16,Default,,0000,0000,0000,,Bice p plus N.
Dialogue: 0,0:10:57.16,0:11:00.45,Default,,0000,0000,0000,,Ali cemo i dalje dobiti \Nnovi element, je li tako?
Dialogue: 0,0:11:00.45,0:11:02.50,Default,,0000,0000,0000,,Kada smo imali \Nbeta raspad, povecao
Dialogue: 0,0:11:02.50,0:11:04.64,Default,,0000,0000,0000,,se broj protona.\NTako da smo
Dialogue: 0,0:11:04.64,0:11:06.94,Default,,0000,0000,0000,,otisli na desnu\Nstranu periodnog sistema
Dialogue: 0,0:11:06.94,0:11:09.30,Default,,0000,0000,0000,,ili smo povecali nasu... \Nshvatate na sta mislim.
Dialogue: 0,0:11:09.30,0:11:12.05,Default,,0000,0000,0000,,Kad imamo pozitronsku emisiju,
Dialogue: 0,0:11:12.05,0:11:14.78,Default,,0000,0000,0000,,smanjuje nam se broj protona.
Dialogue: 0,0:11:14.78,0:11:16.67,Default,,0000,0000,0000,,I ustvari to treba da napisem ovde
Dialogue: 0,0:11:16.67,0:11:17.60,Default,,0000,0000,0000,,kod obe formule.
Dialogue: 0,0:11:17.60,0:11:19.89,Default,,0000,0000,0000,,Znaci ovo je pozitronska emisija, \Ni ostaje mi
Dialogue: 0,0:11:19.89,0:11:21.84,Default,,0000,0000,0000,,jedan pozitron.
Dialogue: 0,0:11:21.84,0:11:29.17,Default,,0000,0000,0000,,A kod beta raspada, \Nostaje mi jedan elektron.
Dialogue: 0,0:11:29.17,0:11:30.90,Default,,0000,0000,0000,,Oni se pisu sasvim isto.\NZnate da je
Dialogue: 0,0:11:30.90,0:11:32.66,Default,,0000,0000,0000,,ovo elektron, \Njer ima -1
Dialogue: 0,0:11:32.66,0:11:34.24,Default,,0000,0000,0000,,naelektrisanje. Znate \Nda je ovo
Dialogue: 0,0:11:34.24,0:11:36.14,Default,,0000,0000,0000,,pozitron, jer ima\N+ 1 naelektrisanje.
Dialogue: 0,0:11:36.14,0:11:38.23,Default,,0000,0000,0000,,Imamo jos jednu vrstu raspada
Dialogue: 0,0:11:38.23,0:11:39.56,Default,,0000,0000,0000,,za koju treba da znate.
Dialogue: 0,0:11:39.56,0:11:41.52,Default,,0000,0000,0000,,Ali se pri njoj ne menja \Nni broj protona
Dialogue: 0,0:11:41.52,0:11:43.41,Default,,0000,0000,0000,,ni neutrona u jezgru.
Dialogue: 0,0:11:43.41,0:11:46.07,Default,,0000,0000,0000,,Pri njoj se samo oslobadja \Nogromna kolicina energije,
Dialogue: 0,0:11:46.07,0:11:48.24,Default,,0000,0000,0000,,ili ponekad, visoko-energetski foton.
Dialogue: 0,0:11:48.24,0:11:50.29,Default,,0000,0000,0000,,I to se zove gama raspad.
Dialogue: 0,0:11:50.29,0:11:52.48,Default,,0000,0000,0000,,Gama raspad znaci da se ova ekipa
Dialogue: 0,0:11:52.48,0:11:53.71,Default,,0000,0000,0000,,samo pregrupise.
Dialogue: 0,0:11:53.71,0:11:55.26,Default,,0000,0000,0000,,Mozda se malo zbiju.
Dialogue: 0,0:11:55.26,0:11:57.80,Default,,0000,0000,0000,,I time oslobode energiju u \Nvidu elektromagnetnog
Dialogue: 0,0:11:57.80,0:12:02.19,Default,,0000,0000,0000,,talasa vrlo velike \Ntalasne duzine. Sto je
Dialogue: 0,0:12:02.19,0:12:04.93,Default,,0000,0000,0000,,u osnovi gama, mozete ga \Nzvati ili gama cestica
Dialogue: 0,0:12:04.93,0:12:07.81,Default,,0000,0000,0000,,ili gama zrak. Koji ima\Nveoma veliku energiju.
Dialogue: 0,0:12:07.81,0:12:10.12,Default,,0000,0000,0000,,Gama zraci su nesto\Nu cijoj blizini
Dialogue: 0,0:12:10.12,0:12:11.95,Default,,0000,0000,0000,,se ne zelite naci.
Dialogue: 0,0:12:11.95,0:12:14.84,Default,,0000,0000,0000,,Velika je mogucnost \Nda mogu mozda i da vas ubiju.
Dialogue: 0,0:12:14.84,0:12:17.70,Default,,0000,0000,0000,,Sve sto smo presli, sto sam rekao \Nje pomalo teoretski.
Dialogue: 0,0:12:17.70,0:12:20.17,Default,,0000,0000,0000,,Hajde da uradimo \Nneke zadatke i otkrijemo
Dialogue: 0,0:12:20.17,0:12:21.76,Default,,0000,0000,0000,,o kom tipu raspada se radi.
Dialogue: 0,0:12:21.76,0:12:24.25,Default,,0000,0000,0000,,Evo ovde imam 7-berilijum \Ngde je sedam
Dialogue: 0,0:12:24.25,0:12:26.42,Default,,0000,0000,0000,,njegov maseni broj.
Dialogue: 0,0:12:26.42,0:12:29.96,Default,,0000,0000,0000,,I pretvoricu ga u 7-litijum.
Dialogue: 0,0:12:29.96,0:12:31.60,Default,,0000,0000,0000,,Dakle, sta se ovde desilo?
Dialogue: 0,0:12:31.60,0:12:35.62,Default,,0000,0000,0000,,Moj berilijum, moj maseni broj \Nje ostao isti, ali
Dialogue: 0,0:12:35.62,0:12:41.23,Default,,0000,0000,0000,,sam presao sa 4 protona na 3 protona.
Dialogue: 0,0:12:41.23,0:12:44.35,Default,,0000,0000,0000,,Znaci smanjujem broj protona.
Dialogue: 0,0:12:44.35,0:12:46.36,Default,,0000,0000,0000,,Moja ukupna masa \Nse nije promenila.
Dialogue: 0,0:12:46.36,0:12:48.57,Default,,0000,0000,0000,,Znaci definitivno \Nnije u pitanju alfa raspad.
Dialogue: 0,0:12:48.57,0:12:51.02,Default,,0000,0000,0000,,Alfa raspad je bio, znate, \Noslobadjate ceo
Dialogue: 0,0:12:51.02,0:12:52.57,Default,,0000,0000,0000,,helijum iz jezgra.
Dialogue: 0,0:12:52.57,0:12:55.07,Default,,0000,0000,0000,,Pa sta onda oslobadjam?
Dialogue: 0,0:12:55.07,0:12:57.28,Default,,0000,0000,0000,,Ja tu kao oslobadjam \Njedno pozitivno naelek-
Dialogue: 0,0:12:57.28,0:12:59.15,Default,,0000,0000,0000,,trisanje, ili oslobadjam pozitron.
Dialogue: 0,0:12:59.15,0:13:00.78,Default,,0000,0000,0000,,I ustvari to imam
Dialogue: 0,0:13:00.78,0:13:03.84,Default,,0000,0000,0000,,u ovoj formuli.\NOvo je pozitron.
Dialogue: 0,0:13:03.84,0:13:06.68,Default,,0000,0000,0000,,Znaci ova vrsta raspada \N7-berilijuma u 7-litijum
Dialogue: 0,0:13:06.68,0:13:09.66,Default,,0000,0000,0000,,je pozitronska emisija.
Dialogue: 0,0:13:09.66,0:13:11.01,Default,,0000,0000,0000,,Vazi.
Dialogue: 0,0:13:11.01,0:13:12.76,Default,,0000,0000,0000,,Hajde da vidimo \Nsledeci zadatak.
Dialogue: 0,0:13:12.76,0:13:20.00,Default,,0000,0000,0000,,Imamo uranijum-238 \Nkoji se raspada u torijum-234.
Dialogue: 0,0:13:20.00,0:13:25.65,Default,,0000,0000,0000,,I vidimo da se maseni broj \Nsmanjuje za 4, minus 4,
Dialogue: 0,0:13:25.65,0:13:28.46,Default,,0000,0000,0000,,i vidimo da se atomski broj \Nsmanjuje, ili
Dialogue: 0,0:13:28.46,0:13:31.11,Default,,0000,0000,0000,,da se protoni smanjuju za 2.
Dialogue: 0,0:13:31.11,0:13:34.07,Default,,0000,0000,0000,,Znaci mora da otpustate, \Nprakticno, nesto sto
Dialogue: 0,0:13:34.07,0:13:36.71,Default,,0000,0000,0000,,ima maseni broj 4, \Na atomski broj
Dialogue: 0,0:13:36.71,0:13:38.97,Default,,0000,0000,0000,,dva, iliti helijum.
Dialogue: 0,0:13:38.97,0:13:41.90,Default,,0000,0000,0000,,Znaci ovo je alfa raspad.
Dialogue: 0,0:13:41.90,0:13:45.19,Default,,0000,0000,0000,,Znaci ovo ovde je alfa cestica.
Dialogue: 0,0:13:45.19,0:13:48.17,Default,,0000,0000,0000,,I ovo je primer alfa raspada.
Dialogue: 0,0:13:48.17,0:13:50.97,Default,,0000,0000,0000,,Sada verovatno kazete, \Ncekaj Sal, ovde se
Dialogue: 0,0:13:50.97,0:13:52.45,Default,,0000,0000,0000,,desava nesto cudno.
Dialogue: 0,0:13:52.45,0:13:56.08,Default,,0000,0000,0000,,Jer ako smo presli sa 92 protona \Nna 90 protona,
Dialogue: 0,0:13:56.08,0:13:58.85,Default,,0000,0000,0000,,i dalje imamo 92 elektrona.
Dialogue: 0,0:13:58.85,0:14:02.66,Default,,0000,0000,0000,,Zar sad ne bih imao/la \Nminus 2 naelektrisanje?
Dialogue: 0,0:14:02.66,0:14:06.85,Default,,0000,0000,0000,,Jos bolje, ovaj helijum \Nkoji otpustam, on nema
Dialogue: 0,0:14:06.85,0:14:08.85,Default,,0000,0000,0000,,nikakve elektrone sa sobom.
Dialogue: 0,0:14:08.85,0:14:10.66,Default,,0000,0000,0000,,To je samo jezgro \Nhelijuma. Zar onda
Dialogue: 0,0:14:10.66,0:14:12.51,Default,,0000,0000,0000,,ono nema +2\Nnaelektrisanje? I kad
Dialogue: 0,0:14:12.51,0:14:14.90,Default,,0000,0000,0000,,biste to rekli, bili\Nbiste apsolutno u pravu.
Dialogue: 0,0:14:14.90,0:14:18.74,Default,,0000,0000,0000,,Ali u stvarnosti cim se \Novaj raspad desi, ovaj
Dialogue: 0,0:14:18.74,0:14:21.11,Default,,0000,0000,0000,,torijum, nema razloga \Nda zadrzi ova dva
Dialogue: 0,0:14:21.11,0:14:24.30,Default,,0000,0000,0000,,elektrona, i tako \Nta dva elektrona nestanu
Dialogue: 0,0:14:24.30,0:14:27.04,Default,,0000,0000,0000,,i torijum postaje \Nponovo neutralan.
Dialogue: 0,0:14:27.04,0:14:30.30,Default,,0000,0000,0000,,A i ovaj helijum isto tako, \Nveoma je brz. On jako
Dialogue: 0,0:14:30.30,0:14:32.40,Default,,0000,0000,0000,,zeli dva elektrona \Nda se stabilizuje,
Dialogue: 0,0:14:32.40,0:14:34.84,Default,,0000,0000,0000,,pa je brz da ugrabi \Ndva elektrona od onoga
Dialogue: 0,0:14:34.84,0:14:38.43,Default,,0000,0000,0000,,na sta usput naleti, \Ni tako postaje stabilan.
Dialogue: 0,0:14:38.43,0:14:40.72,Default,,0000,0000,0000,,To mozete napisati \Nna jedan od ta dva nacina.
Dialogue: 0,0:14:40.72,0:14:42.64,Default,,0000,0000,0000,,Hajde da uradimo jos jedan.
Dialogue: 0,0:14:42.64,0:14:44.59,Default,,0000,0000,0000,,Evo ovde imam jod.
Dialogue: 0,0:14:45.40,0:14:48.12,Default,,0000,0000,0000,,Da vidimo sta se desava.
Dialogue: 0,0:14:48.12,0:14:49.94,Default,,0000,0000,0000,,Masa mi se ne menja.
Dialogue: 0,0:14:49.94,0:14:52.73,Default,,0000,0000,0000,,Znaci moraju mi se \Nprotoni pretvoriti u neutrone
Dialogue: 0,0:14:52.73,0:14:55.18,Default,,0000,0000,0000,,ili neutroni u protone.
Dialogue: 0,0:14:55.18,0:14:58.57,Default,,0000,0000,0000,,A ovde vidim da imam \N53 protona, a
Dialogue: 0,0:14:58.57,0:15:00.94,Default,,0000,0000,0000,,sada imam 54 protona.
Dialogue: 0,0:15:00.94,0:15:03.43,Default,,0000,0000,0000,,Znaci morao se \Nneutron pretvoriti u proton.
Dialogue: 0,0:15:03.43,0:15:06.56,Default,,0000,0000,0000,,Neutron je morao preci u proton.
Dialogue: 0,0:15:06.56,0:15:08.41,Default,,0000,0000,0000,,A nacin na koji \Nneutron prelazi
Dialogue: 0,0:15:08.41,0:15:11.41,Default,,0000,0000,0000,,u proton je \Noslobadjanjem elektrona.
Dialogue: 0,0:15:11.41,0:15:13.74,Default,,0000,0000,0000,,I to vidimo u ovoj formuli ovde.
Dialogue: 0,0:15:13.74,0:15:16.87,Default,,0000,0000,0000,,Oslobodjen je elektron.
Dialogue: 0,0:15:16.87,0:15:19.31,Default,,0000,0000,0000,,I tako je ovo beta raspad.
Dialogue: 0,0:15:19.31,0:15:20.98,Default,,0000,0000,0000,,Ovo je beta cestica.
Dialogue: 0,0:15:24.98,0:15:26.85,Default,,0000,0000,0000,,I ovde je ista logika.
Dialogue: 0,0:15:26.85,0:15:30.21,Default,,0000,0000,0000,,Sad cete vi - cekaj, \Npresli smo sa 53 na 54 protona.
Dialogue: 0,0:15:30.21,0:15:33.24,Default,,0000,0000,0000,,Sad kad imam proton viska, \Nzar necu imati
Dialogue: 0,0:15:33.24,0:15:35.56,Default,,0000,0000,0000,,pozitivno naelektrisanje ovde?
Dialogue: 0,0:15:35.56,0:15:37.60,Default,,0000,0000,0000,,Pa, imali bi.
Dialogue: 0,0:15:37.60,0:15:40.35,Default,,0000,0000,0000,,Ali veoma brzo ce ovaj - \Nverovatno nece zgrabiti bas ove
Dialogue: 0,0:15:40.35,0:15:43.22,Default,,0000,0000,0000,,elektrone ovde, toliko \Nelektrona kruzi okolo - ali
Dialogue: 0,0:15:43.22,0:15:44.91,Default,,0000,0000,0000,,zgrabice elektrone \Nodnegde da bi
Dialogue: 0,0:15:44.91,0:15:46.78,Default,,0000,0000,0000,,postao stabilan, i bice \Nopet stabilan.
Dialogue: 0,0:15:46.78,0:15:48.60,Default,,0000,0000,0000,,U pravu ste \Nako ste pomislili -
Dialogue: 0,0:15:48.60,0:15:51.25,Default,,0000,0000,0000,,zar to nece biti jon bar neki \Nkratak delic vremena?
Dialogue: 0,0:15:51.25,0:15:53.15,Default,,0000,0000,0000,,Hajde da uradimo jos jedan zadatak.
Dialogue: 0,0:15:53.15,0:15:56.75,Default,,0000,0000,0000,,Znaci imamo 222-radon - \Nkoji ima atomski broj 86 -
Dialogue: 0,0:15:56.75,0:16:01.65,Default,,0000,0000,0000,,i prelazi u 218-polonijum, \Nsa atomskim brojem 84.
Dialogue: 0,0:16:01.65,0:16:03.33,Default,,0000,0000,0000,,I ovde imam \Ninteresantan komentar.
Dialogue: 0,0:16:03.33,0:16:07.37,Default,,0000,0000,0000,,Polonijum je dobio ime \Npo Poljskoj, zbog Marije Kiri,
Dialogue: 0,0:16:07.37,0:16:11.11,Default,,0000,0000,0000,,ona - u to vreme Poljska, \Nto je bilo krajem veka,
Dialogue: 0,0:16:11.11,0:16:14.05,Default,,0000,0000,0000,,oko kraja 1800-ih, \NPoljska nije postojala kao
Dialogue: 0,0:16:14.05,0:16:16.46,Default,,0000,0000,0000,,zasebna drzava.
Dialogue: 0,0:16:16.46,0:16:19.13,Default,,0000,0000,0000,,Bila je podeljena izmedju \NPrusije, Rusije i Austrije.
Dialogue: 0,0:16:19.13,0:16:21.61,Default,,0000,0000,0000,,I oni su hteli da stave \Nljudima do znanja da,
Dialogue: 0,0:16:21.61,0:16:24.21,Default,,0000,0000,0000,,hej, znate, mi mislimo \Nda smo mi jedan narod.
Dialogue: 0,0:16:24.21,0:16:26.73,Default,,0000,0000,0000,,I onda su pronasli da kad, \Nje li, se radon raspada
Dialogue: 0,0:16:26.73,0:16:28.71,Default,,0000,0000,0000,,on formira ovaj element.
Dialogue: 0,0:16:28.71,0:16:31.41,Default,,0000,0000,0000,,I nazvali su ga \Npo svojoj otadzbini, po Poljskoj.
Dialogue: 0,0:16:31.41,0:16:33.73,Default,,0000,0000,0000,,Tu privilegiju imate \Nkad otkrijete novi element.
Dialogue: 0,0:16:33.73,0:16:34.83,Default,,0000,0000,0000,,Bilo kako bilo, \Nda se
Dialogue: 0,0:16:34.83,0:16:36.47,Default,,0000,0000,0000,,vratimo problemu. \NI sta se desilo?
Dialogue: 0,0:16:36.47,0:16:38.66,Default,,0000,0000,0000,,Masa atoma \Nse smanjila za cetiri.
Dialogue: 0,0:16:38.66,0:16:41.25,Default,,0000,0000,0000,,Atomski broj se smanjio za dva.
Dialogue: 0,0:16:41.25,0:16:44.36,Default,,0000,0000,0000,,Znaci jos jednom, mora da smo \Nemitovali cesticu helijuma.
Dialogue: 0,0:16:44.36,0:16:49.00,Default,,0000,0000,0000,,Jezgro helijuma, nesto \Nsto ima maseni broj
Dialogue: 0,0:16:49.00,0:16:51.30,Default,,0000,0000,0000,,cetiri, a atomski broj dva.
Dialogue: 0,0:16:51.30,0:16:52.81,Default,,0000,0000,0000,,I to je to.
Dialogue: 0,0:16:52.81,0:16:55.97,Default,,0000,0000,0000,,Dakle ovo je \Nalfa raspad.
Dialogue: 0,0:16:55.97,0:16:57.87,Default,,0000,0000,0000,,Ovo mozemo \Nzapisati kao
Dialogue: 0,0:16:57.87,0:16:59.63,Default,,0000,0000,0000,,jezgro helijuma.\NZnaci nema elektrona.
Dialogue: 0,0:16:59.64,0:17:01.94,Default,,0000,0000,0000,,Mogli bismo odmah reci \Nda bi ovo bilo negativno
Dialogue: 0,0:17:01.94,0:17:03.00,Default,,0000,0000,0000,,naelektrisano, \Nali tad gubi