Berkelium
97
Bk
Groep
n.v.t.
Periode
7
Blok
f
Protonen
Elektronen
Neutronen
97
97
150
Algemene Eigenschappen
Atoomnummer
97
Atomair gewicht
[247]
Massa Getal
247
Categorie
Actiniden
Kleur
n.v.t.
Radioactief
Ja
Named after Berkeley, California, the city of its discovery
Kristalstructuur
Eenvoudige Hexagonaal
Historie
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.
Eletronen per schil
2, 8, 18, 32, 27, 8, 2
Electronconfiguratie
[Rn] 5f9 7s2
Just over one gram of berkelium has been produced in the United States since 1967
Fysieke Eigenschappen
Fase
Vast
Dichtheid
14,78 g/cm3
Smeltpunt
1259,15 K | 986 °C | 1806,8 °F
Kookpunt
3173,15 K | 2900 °C | 5252 °F
Fusiewarmte
n.v.t.
Verdampingswarmte
n.v.t.
Specifieke Warmtecapaciteit
-
Overvloedig aanwezig in de aardkorst
n.v.t.
Overvloedig aanwezig in het universum
n.v.t.
Verdiensten voor afbeeldingen: 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
Atoomeigenschappen
Atoomstraal
170 pm
Covalentiestraal
-
Electronegativiteit
1,3 (Pauling schaal)
Ionisatiepotentiaal
6,1979 eV
Atoomvolume
16,7 cm3/mol
Thermische geleiding
0,1 W/cm·K
Oxidatietoestanden
3, 4
Toepassingen
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
Isotopen
Stabiele isotopen
-Instabiele isotopen
233Bk, 235Bk, 236Bk, 237Bk, 238Bk, 239Bk, 240Bk, 241Bk, 242Bk, 243Bk, 244Bk, 245Bk, 246Bk, 247Bk, 248Bk, 249Bk, 250Bk, 251Bk, 252Bk, 253Bk, 254Bk