Kalifornium

98
Cf
Groep
n/a
Periode
7
Blok
f
Protrone
Elektrone
Neutrone
98
98
153
Algemene Eienskappe
Atoom Nommer
98
Atoommassa
[251]
Massa Nommer
251
Kategorie
Aktiniede
Kleur
n/a
Radioaktief
Ja
Named after California and the University of California
Kristalstruktuur
Eenvoudige seshoekige
Geskiendenis
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.
Elektrone per skil
2, 8, 18, 32, 28, 8, 2
Elektronkonfigurasie
[Rn] 5f10 7s2
Cf
Californium is produced in nuclear reactors and particle accelerators
Fisiese Eienskappe
Fase
Soliede
Digtheid
15,1 g/cm3
Smeltpunt
1173,15 K | 900 °C | 1652 °F
Kookpunt
-
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
Illustration
Beeld Krediete: Images-of-elements
Illustration of californium
CAS Nommer
7440-71-3
PubChem CID Nommer
n/a
Atomiese Eienskappe
Atoom radius
-
Kovalente Radius
-
Elektronegatiewiteit
1,3 (Pauling scale)
Ionisasie potensiaal
6,2817 eV
Atoom volume
18,4 cm3/mol
Termiese geleidingsvermoë
0,1 W/cm·K
Oksidasiestate
2, 3, 4
Toepassings
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.
Californium is harmful due to its radioactivity
Isotope
Stabiele Isotope
-
Onstabiele Isotope
237Cf, 238Cf, 239Cf, 240Cf, 241Cf, 242Cf, 243Cf, 244Cf, 245Cf, 246Cf, 247Cf, 248Cf, 249Cf, 250Cf, 251Cf, 252Cf, 253Cf, 254Cf, 255Cf, 256Cf