Californium
98
Cf
Gruppe
n/a
Periode
7
Blok
f
Protoner
Elektroner
Neutroner
98
98
153
Generelle Egenskaber
Atomnummer
98
Atommasse
[251]
Masseantal
251
Kategori
Actinider
Farve
n/a
Radioaktiv
Ja
Named after California and the University of California
Krystalstruktur
Simpel Hexagonal
Historie
Californium was discovered by Stanley G. Thompson, Kenneth Street, Jr., Albert Ghiorso and Glenn T. Seaborg in 1950 at the University of California, Berkeley.
It was produced by the bombardment of curium with alpha particles.
Californium was isolated in macro quantities for the first time by Burris Cunningham and Stanley Thompson in 1958.
It was produced by the bombardment of curium with alpha particles.
Californium was isolated in macro quantities for the first time by Burris Cunningham and Stanley Thompson in 1958.
Elektroner i hver skal
2, 8, 18, 32, 28, 8, 2
Elektronkonfiguration
[Rn] 5f10 7s2
Californium is produced in nuclear reactors and particle accelerators
Fysiske Egenskaber
Tilstandsform
Fast stof
Massefylde
15,1 g/cm3
Smeltepunkt
1173,15 K | 900 °C | 1652 °F
Kogepunkt
-
Smeltevarme
n/a
Fordampningsvarme
n/a
Varmefylde
-
Forekomst i jordskorpen
n/a
Forekomst i universet
n/a
CAS-nummer
7440-71-3
PubChem CID-nummer
n/a
Atomare egenskaber
Atomradius
-
Kovalent radius
-
Elektronegativitet
1,3 (Paulings skala)
Ioniseringspotentiale
6,2817 eV
Atomvolumen
18,4 cm3/mol
Varmeledningsevne
0,1 W/cm·K
Oxidationstrin
2, 3, 4
Anvendelser
Californium is used as a portable neutron source for discovery of metals such as gold or silver by on-the-spot activation analysis.
Neutrons from californium are employed as a treatment of certain cervical and brain cancers where other radiation therapy is ineffective.
Neutron moisture gauges use californium-252 to find water and petroleum layers in oil wells.
Neutrons from californium are employed as a treatment of certain cervical and brain cancers where other radiation therapy is ineffective.
Neutron moisture gauges use californium-252 to find water and petroleum layers in oil wells.
Californium is harmful due to its radioactivity
Isotoper
Stabile isotoper
-Ustabile isotoper
237Cf, 238Cf, 239Cf, 240Cf, 241Cf, 242Cf, 243Cf, 244Cf, 245Cf, 246Cf, 247Cf, 248Cf, 249Cf, 250Cf, 251Cf, 252Cf, 253Cf, 254Cf, 255Cf, 256Cf