Berkelium

97
Bk
Groep
n/a
Periode
7
Blok
f
Protrone
Elektrone
Neutrone
97
97
150
Algemene Eienskappe
Atoom Nommer
97
Atoommassa
[247]
Massa Nommer
247
Kategorie
Aktiniede
Kleur
n/a
Radioaktief
Ja
Named after Berkeley, California, the city of its discovery
Kristalstruktuur
Eenvoudige seshoekige
Geskiendenis
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.
Elektrone per skil
2, 8, 18, 32, 27, 8, 2
Elektronkonfigurasie
[Rn] 5f9 7s2
Bk
Just over one gram of berkelium has been produced in the United States since 1967
Fisiese Eienskappe
Fase
Soliede
Digtheid
14,78 g/cm3
Smeltpunt
1259,15 K | 986 °C | 1806,8 °F
Kookpunt
3173,15 K | 2900 °C | 5252 °F
Heat of Fusion
n/a
Heat of Vaporization
n/a
Spesifieke Hitte Kapasiteit
-
Oorvloed in die aardkors
n/a
Oorvloed in die heelal
n/a
The
Beeld Krediete: Wikimedia Commons (Department of Energy - Office of Public Affairs)
The 60-inch cyclotron at the Lawrence Radiation Laboratory, University of California, Berkeley
CAS Nommer
7440-40-6
PubChem CID Nommer
23971
Atomiese Eienskappe
Atoom radius
170 pm
Kovalente Radius
-
Elektronegatiewiteit
1,3 (Pauling scale)
Ionisasie potensiaal
6,1979 eV
Atoom volume
16,7 cm3/mol
Termiese geleidingsvermoë
0,1 W/cm·K
Oksidasiestate
3, 4
Toepassings
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
Isotope
Stabiele Isotope
-
Onstabiele Isotope
233Bk, 235Bk, 236Bk, 237Bk, 238Bk, 239Bk, 240Bk, 241Bk, 242Bk, 243Bk, 244Bk, 245Bk, 246Bk, 247Bk, 248Bk, 249Bk, 250Bk, 251Bk, 252Bk, 253Bk, 254Bk