Berkelij
97
Bk
Skupina
n/a
Perioda
7
Blok
f
Protoni
Elektroni
Neutroni
97
97
150
Opća svojstva
Atomski broj
97
Relativna atomska masa
[247]
Maseni broj
247
Kategorija
Aktinoidi
Boja
n/a
Radioaktivan
Da
Imenovan po Berkeleyju, u Kaliforniji, gradu u kojem je otkriven
Kristalna struktura
Jednostavna heksagonska
Povijest
Berkelium was discovered by Glenn T. Seaborg, Albert Ghiorso and Stanley G. Thompson in 1949 at the University of California, Berkeley.
It was produced by the bombardment of americium with alpha particles.
Berkelium was isolated in greater quantities for the first time by Burris Cunningham and Stanley Thompson in 1958.
It was produced by the bombardment of americium with alpha particles.
Berkelium was isolated in greater quantities for the first time by Burris Cunningham and Stanley Thompson in 1958.
Elektrona po ljusci
2, 8, 18, 32, 27, 8, 2
Elektronska konfiguracija
[Rn] 5f9 7s2
Just over one gram of berkelium has been produced in the United States since 1967
Fizikalna svojstva
Agregacijsko stanje
Čvrsto
Gustoća
14,78 g/cm3
Talište
1259,15 K | 986 °C | 1806,8 °F
Vrelište
3173,15 K | 2900 °C | 5252 °F
Toplina taljenja
n/a
Toplina isparavanja
n/a
Specifični toplinski kapacitet
-
Zastupljenost u Zemljinoj kori
n/a
Zastupljenost u svemiru
n/a
Izvor slike: Wikimedia Commons (Department of Energy - Office of Public Affairs)
The 60-inch cyclotron at the Lawrence Radiation Laboratory, University of California, Berkeley
CAS broj
7440-40-6
PubChem CID broj
23971
Atomska svojstva
Atomski radijus
170 pm
Kovalentni radijus
-
Elektronegativnost
1,3 (Paulingova ljestvica)
Potencijal ionizacije
6,1979 eV
Atomski volumen
16,7 cm3/mol
Toplinska vodljivost
0,1 W/cm·K
Stanja oksidacije
3, 4
Primjene
Berkelium is mainly used for scientific research purposes.
Berkelium-249 is a common target nuclide to prepare still heavier transuranic elements and transactinides, such as lawrencium, rutherfordium and bohrium.
It is also useful as a source of the isotope californium-249.
Berkelium-249 is a common target nuclide to prepare still heavier transuranic elements and transactinides, such as lawrencium, rutherfordium and bohrium.
It is also useful as a source of the isotope californium-249.
Berkelium is harmful due to its radioactivity
Izotopi
Stabilni izotopi
-Nestabilni izotopi
233Bk, 235Bk, 236Bk, 237Bk, 238Bk, 239Bk, 240Bk, 241Bk, 242Bk, 243Bk, 244Bk, 245Bk, 246Bk, 247Bk, 248Bk, 249Bk, 250Bk, 251Bk, 252Bk, 253Bk, 254Bk