Element Fermium

Fermium ElementIt was discovered in the debris of the first hydrogen bomb explosion in 1952, and named after Enrico Fermi, one of the pioneers of nuclear physics.
Fermium is a synthetic element with the symbol Fm and atomic number 100.
Owing to the small amounts of produced fermium and all of its isotopes having relatively short half-lives, there are currently no uses for it outside basic scientific research.
It is an actinide and the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities, although pure fermium metal has not yet been prepared
Its chemistry is typical for the late actinides, with a preponderance of the +3 oxidation state but also an accessible +2 oxidation state

Names and Identifiers

Chemical Formula:Fm
CAS:7440-72-4
Molecular Weight:257.00000g/mol
EC Number :n/a
MDL Number:n/a
Color:unknown (presumably metallic/ silvery white/ gray)
Other Names:Fermio
PubChem CID:23998
IUPAC Name:Fermium
Inchl:InChI=1S/Fm
InChI Key:MIORUQGGZCBUGO-UHFFFAOYSA-N
Canonical SMILES:[Fm]
ICSC Number:n/a

Physical & Chemical Properties

Phase:Solid
Density:9.1 g/cm³
Boiling Point:1800 K (1527 °C, 2781 °F)
Melting Point:n/a
Molecular Formula:Fm
Flash Point:n/a
Exact Mass:257.09500

There are 20 isotopes of fermium listed in NUBASE 2016, with atomic weights of 241 to 260.

Radiosotope data

IsotopeMass/DaHalf-lifeMode of decayNuclear spinNuclear magnetic moment
251Fm251.081575.3 hEC to 251Es; α to 247Cf9/2
252Fm252.082461.058 dα to 248Cf; SF0
253Fm253.085173 dEC to 253Es; α to 249Cf1/2
254Fm254.086853.24 hα to 250Cf; SF0
255Fm255.0899520.1 hα to 251Cf; SF7/2
256Fm256.091772.63 hα to 252Cf; SF0
257Fm257.095099 (8)100.5 dα to 253Cf; SF9/2

We’re ready to partner with you.