Fermium: the essentials

Fermium's chemical properties are largely unknown. Fermium is a radioactive rare earth metal. The longest living isotope is is 257Fm with a half-life of 80 days. It is of no commercial importance.

Fermium: historical information

Fermium was discovered by Workers at Argonne, Los Alamos, USA, and the University of California at Berkeley, USA. in 1952 at USA. Origin of name: named after "Enrico Fermi".

Fermium was identified by Ghiorso and coworkers (Berkeley, California, USA) in 1952 in the radioactive debris from a thermonuclear explosion in the Pacific. Somewhat remarkably, the fermium isotope discovered was made through the combination of 238U with 17 neutrons. Today, many isotopes are known spanning the mass range 243-258.

Fermium around us Read more »

Fermium has no biological role.

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

Abundances for fermium 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 fermium is: .

Fermium: orbital properties Read more »

Fermium atoms have 100 electrons and the shell structure is The ground state electronic configuration of neutral Fermium is [Rn].5f12.7s2 and the term symbol of Fermium is 3H6.


Isolation: coming soon!

Fermium isotopes Read more »

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

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