Californium: the essentials

Californium is a radioactive rare earth metal named after the state of California and the University of California (USA). Californium-252 is a strong neutron emitter and one microgram emits 170 million neutrons per minute, making it a biological hazard. It has a few specialised uses but only a few of its compounds are known.

Californium: historical information

Californium was discovered by Glenn T. Seaborg, Stanley G. Thompson, Albert Ghiorso, Kenneth Street in 1950 at USA. Origin of name: named after the State and University of "California", USA.

Californium was produced by Ghiorso and others at the University of California, Berkeley, USA in 1950 who bombarded 242Cm with helium ions.

Californium around us Read more »

Californium has no biological role.

Californium is a synthetic element that is not present in the geosphere.

Abundances for californium in a number of different environments. More abundance data »
Location ppb by weight ppb by atoms Links
Universe (no data) (no data) Chemical elements abundance by weight in the universe on a miniature periodic table spark table
Crustal rocks (no data) (no data) Chemical elements abundance by weight in the earth's crust on a miniature periodic table spark table
Human (no data) ppb by weight (no data) atoms relative to C = 1000000 Chemical elements abundance by weight in humans on a miniature periodic table spark table

Physical properties Read more »

Heat properties Read more »

Crystal structure Read more »

The solid state structure of californium is: hcp (hexagonal close-packed).

Californium: orbital properties Read more »

Californium atoms have 98 electrons and the shell structure is The ground state electronic configuration of neutral Californium is [Rn].5f10.7s2 and the term symbol of Californium is 5I8.


Isolation: coming soon!

Californium isotopes Read more »

Table. Stables isotopes of californium.
Isotope Mass
(atom %)
spin (I)
moment (μ/μN)

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