Берклиум

97
Bk
Група
Нема одговор
Периода
7
блок
f
Protons
Electrons
Neutrons
97
97
150
Општи Својства
Атомски број
97
Атомска тежина
[247]
Mass Number
247
Category
Актиноид
Color
Нема одговор
Radioactive
Да
Named after Berkeley, California, the city of its discovery
Кристална структура
Simple Hexagonal
History
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.
Electrons per shell
2, 8, 18, 32, 27, 8, 2
Електронска конфигурација
[Rn] 5f9 7s2
Bk
Just over one gram of berkelium has been produced in the United States since 1967
Физички Својства
Фаза
Solid
Густина
14,78 g/cm3
Точка на топење
1259,15 K | 986 °C | 1806,8 °F
Точка на вриење
3173,15 K | 2900 °C | 5252 °F
Топлина на топење
Нема одговор
Топлина на испарување
Нема одговор
Specific Heat Capacity
-
Abundance in Earth's crust
Нема одговор
Abundance in Universe
Нема одговор
The
Кредити на слика: Wikimedia Commons (Department of Energy - Office of Public Affairs)
The 60-inch cyclotron at the Lawrence Radiation Laboratory, University of California, Berkeley
CAS Number
7440-40-6
PubChem CID Number
23971
Атомски Својства
Атомски полупречник
170 pm
Ковалентен полупречник
-
Електронегативност
1,3 (Полингова скала)
Ionization Potential
6,1979 eV
Atomic Volume
16,7 cm3/mol
Thermal Conductivity
0,1 W/cm·K
Oxidation States
3, 4
Applications
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 is harmful due to its radioactivity
Isotopes
Stable Isotopes
-
Unstable Isotopes
233Bk, 235Bk, 236Bk, 237Bk, 238Bk, 239Bk, 240Bk, 241Bk, 242Bk, 243Bk, 244Bk, 245Bk, 246Bk, 247Bk, 248Bk, 249Bk, 250Bk, 251Bk, 252Bk, 253Bk, 254Bk