Berkelij
97
Bk
Skupina
n/a
Perioda
7
Blok
f
Protons
Electrons
Neutrons
97
97
150
General Properties
Vrstno število
97
Atomska teža
[247]
Mass Number
247
Kategorija
Aktinoidi
Barva
n/a
Radioactive
Da
Named after Berkeley, California, the city of its discovery
Kristalna struktura
Heksagonalna
Zgodovina
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 shell
2, 8, 18, 32, 27, 8, 2
Razporeditev elektronov
[Rn] 5f9 7s2
Just over one gram of berkelium has been produced in the United States since 1967
Physical Properties
Faza snovi
Trdnina
Gostota
14,78 g/cm3
Tališče
1259,15 K | 986 °C | 1806,8 °F
Vrelišče
3173,15 K | 2900 °C | 5252 °F
Talilna toplota
n/a
Izparilna toplota
n/a
Toplotna kapaciteta
-
Abundance in Earth's crust
n/a
Abundance in Universe
n/a
Zasluge za slike: 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
Atomic Properties
Atomski polmer
170 pm
Kovalentni polmer
-
Elektronegativnost
1,3 (Paulingova lestvica)
Ionization Potential
6,1979 eV
Atomic Volume
16,7 cm3/mol
Toplotna prevodnost
0,1 W/cm·K
Oksidacijska stanja
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-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