Berkeli
97
Bk
Grup
n/a
Període
7
Bloc
f
Protons
Electrons
Neutrons
97
97
150
Propietats Generals
Nombre atòmic
97
Massa atòmica
[247]
Nombre de massa
247
Categoria
Actínids
Color
n/a
Radioactiu
Sí
Named after Berkeley, California, the city of its discovery
Estructura cristal·lina
Hexàgon simple
Història
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.
Electrons per capa
2, 8, 18, 32, 27, 8, 2
Configuració electrònica
[Rn] 5f9 7s2
Just over one gram of berkelium has been produced in the United States since 1967
Propietats Físiques
Fase
Sòlid
Densitat
14,78 g/cm3
Punt de fusió
1259,15 K | 986 °C | 1806,8 °F
Punt d'ebullició
3173,15 K | 2900 °C | 5252 °F
Entalpia de fusió
n/a
Entalpia de vaporització
n/a
Capacitat tèrmica específica
-
Abundància a l'escorça terrestre
n/a
Abundància a l'univers
n/a
![The](https://periodic-table.io/images/elements/Bk.jpg)
Crèdits de les imatges: Wikimedia Commons (Department of Energy - Office of Public Affairs)
The 60-inch cyclotron at the Lawrence Radiation Laboratory, University of California, Berkeley
Número CAS
7440-40-6
Número CID de PubChem
23971
Propietats Atòmiques
Radi atòmic
170 pm
Radi covalent
-
Electronegativitat
1,3 (Escala de Pauling)
Potencial d'ionització
6,1979 eV
Volum atòmic
16,7 cm3/mol
Conductivitat tèrmica
0,1 W/cm·K
Estats d'oxidació
3, 4
Aplicacions
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
Isòtops
Isòtops estables
-Isòtops inestables
233Bk, 235Bk, 236Bk, 237Bk, 238Bk, 239Bk, 240Bk, 241Bk, 242Bk, 243Bk, 244Bk, 245Bk, 246Bk, 247Bk, 248Bk, 249Bk, 250Bk, 251Bk, 252Bk, 253Bk, 254Bk