Berkelium

97
Bk
Gruppe
n/a
Periode
7
Blok
f
Protons
Electrons
Neutrons
97
97
150
General Properties
Atomnummer
97
Atommasse
[247]
Mass Number
247
Kategori
Actinider
Farve
n/a
Radioactive
Ja
Named after Berkeley, California, the city of its discovery
Krystalstruktur
Simpel 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.
Elektroner i hver skal
2, 8, 18, 32, 27, 8, 2
Elektronkonfiguration
[Rn] 5f9 7s2
Bk
Just over one gram of berkelium has been produced in the United States since 1967
Physical Properties
Tilstandsform
Fast stof
Massefylde
14,78 g/cm3
Smeltepunkt
1259,15 K | 986 °C | 1806,8 °F
Kogepunkt
3173,15 K | 2900 °C | 5252 °F
Smeltevarme
n/a
Fordampningsvarme
n/a
Varmefylde
-
Abundance in Earth's crust
n/a
Abundance in Universe
n/a
The
Billede akkrediteringer: 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
Atomradius
170 pm
Kovalent radius
-
Elektronegativitet
1,3 (Paulings skala)
Ionization Potential
6,1979 eV
Atomic Volume
16,7 cm3/mol
Varmeledningsevne
0,1 W/cm·K
Oxidationstrin
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
Isotoper
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