Electronic data		Thermal data		Steric data
Shells: 2,8,18,32,30,8,2 Orbitals: [Rn] 5f12 7s2 Electronegativity: 1.2, -- 1. Ionization potential: 6.50 eV 2. Ionization potential: -- eV 3. Ionization potential: -- eV Oxidation states: 3 Electrical conductivity: --		Melting point: -- °C Boiling point: -- °C Specific heat: -- J/gK Heat of fusion: -- kJ/mol Heat of vaporization: -- kJ/mol Thermal conductivity: 0.1 W/cmK		Atomic radius: -- Å Ionic radius: -- Å () Covalent radius: -- Å Atomic volume: -- cm³/mol Density (293 K): -- g/cm³ Crystal structure: --

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
249Fm	0	249	7/2	3m	EC,	View
250Fm	0	250.08	0	30m	,EC,SF	View
251Fm	0	251	9/2	5.3h	EC,	View
252Fm	0	252.083	0	1.058d	,SF	View
253Fm	0	253.085	1/2	3d	EC,	View
254Fm	0	254.087	0	3.24h	,SF	View
255Fm	0	255.09	7/2	20.1h	,SF	View
256Fm	0	256.092	0	2.63h	SF,	View
257Fm	0	257.095	9/2	100.5d	,SF	View

Legend

Name origin:	Named in honor of the scientist Enrico Fermi.
Description:	Synthetic radioactive metal.
Discovered by:	Argonne, Los Alamos, U of Calif
Year:	1953
Place:	United States
Sources:	Produced by bombarding lighter transuranium elements with still lighter particles or by neutron capture.
Use(s):	It has no significant commercial applications.