Berkelium
97
Bk
Grupp
Ej tillämplig
Period
7
Block
f
Protoner
Elektroner
Neutroner
97
97
150
Generella Egenskaper
Atomnummer
97
Atommassa
[247]
Masstal
247
Kategori
Aktinider
Färg
Ej tillämplig
Radioaktiv
Ja
Named after Berkeley, California, the city of its discovery
Kristallstruktur
Enkelt hexagonalt
Historia
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.
Elektroner per skal
2, 8, 18, 32, 27, 8, 2
Elektronkonfiguration
[Rn] 5f9 7s2
Just over one gram of berkelium has been produced in the United States since 1967
Fysikaliska Egenskaper
Aggregationstillstånd
Fast
Densitet
14,78 g/cm3
Smältpunkt
1259,15 K | 986 °C | 1806,8 °F
Kokpunkt
3173,15 K | 2900 °C | 5252 °F
Smältvärme
Ej tillämplig
Ångbildningsvärme
Ej tillämplig
Specifik värmekapacitet
-
Förekomst i jordskorpan
Ej tillämplig
Förekomst i universum
Ej tillämplig
Bildkrediter: Wikimedia Commons (Department of Energy - Office of Public Affairs)
The 60-inch cyclotron at the Lawrence Radiation Laboratory, University of California, Berkeley
CAS-nummer
7440-40-6
PubChem CID-nummer
23971
Atomära Egenskaper
Atomradie
170 pm
Kovalent radie
-
Elektronegativitet
1,3 (Paulingskalan)
Jonisationspotential
6,1979 eV
Molvolym
16,7 cm3/mol
Värmeledningsförmåga
0,1 W/cm·K
Oxidationstillstånd
3, 4
Användningsområden
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
Isotoper
Stabila isotoper
-Instabila isotoper
233Bk, 235Bk, 236Bk, 237Bk, 238Bk, 239Bk, 240Bk, 241Bk, 242Bk, 243Bk, 244Bk, 245Bk, 246Bk, 247Bk, 248Bk, 249Bk, 250Bk, 251Bk, 252Bk, 253Bk, 254Bk