Californium

98
Cf
Grupp
n/a
Period
7
Block
f
Protoner
Electrons
Neutroner
98
98
153
Generella Egenskaper
Atomnummer
98
Atommassa
[251]
Mass Number
251
Kategori
Aktinider
Färg
n/a
Radioaktiv
Ja
Named after California and the University of California
Kristallstruktur
Enkelt hexagonalt
Historia
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.
Elektroner per skal
2, 8, 18, 32, 28, 8, 2
Elektronkonfiguration
[Rn] 5f10 7s2
Cf
Californium is produced in nuclear reactors and particle accelerators
Fysikaliska Egenskaper
Aggregationstillstånd
Fast
Densitet
15,1 g/cm3
Smältpunkt
1173,15 K | 900 °C | 1652 °F
Kokpunkt
-
Smältvärme
n/a
Ångbildningsvärme
n/a
Specifik värmekapacitet
-
Abundance in Earth's crust
n/a
Abundance in Universe
n/a
Illustration
Bildkrediter: Images-of-elements
Illustration of californium
CAS Number
7440-71-3
PubChem CID Number
n/a
Atomära Egenskaper
Atomradie
-
Kovalent radie
-
Elektronegativitet
1,3 (Paulingskalan)
Jonisationspotential
6,2817 eV
Molvolym
18,4 cm3/mol
Värmeledningsförmåga
0,1 W/cm·K
Oxidationstillstånd
2, 3, 4
Applications
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
Isotoper
Stabila isotoper
-
Instabila isotoper
237Cf, 238Cf, 239Cf, 240Cf, 241Cf, 242Cf, 243Cf, 244Cf, 245Cf, 246Cf, 247Cf, 248Cf, 249Cf, 250Cf, 251Cf, 252Cf, 253Cf, 254Cf, 255Cf, 256Cf