Electronic data		Thermal data		Steric data
Shells: 2,8,13,1 Orbitals: [Ar] 3d5 4s1 Electronegativity: 1.6, 1.6 1. Ionization potential: 6.7666 eV 2. Ionization potential: 16.50 eV 3. Ionization potential: 30.96 eV Oxidation states: 6,3,2,0 Electrical conductivity: 0.0774 10^6		Melting point: 1857 °C Boiling point: 2672 °C Specific heat: 0.45 J/gK Heat of fusion: 16.90 kJ/mol Heat of vaporization: 344.30 kJ/mol Thermal conductivity: 0.937 W/cmK		Atomic radius: 1.85 Å Ionic radius: 0.62 Å () Covalent radius: 1.18 Å Atomic volume: 7.23 cm³/mol Density (293 K): 7.19 g/cm³ Crystal structure: Cubic: Body centered

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
49Cr	0	49	5/2	42.3m	+	View
50Cr	4.31	49.946	0	--	stable	--
51Cr	0	50.945	7/2	27.70d	EC	View
52Cr	83.76	51.9405	0	--	stable	--
53Cr	9.55	52.9407	3/2	--	stable	--
54Cr	2.38	53.9389	0	--	stable	--

Legend

Name origin:	Greek: chrôma (color)
Description:	Very hard, crystalline, steel-gray metal. The pure metal has a blue-white color. It is hard, brittle and corrsion-resistant at normal temperatures.
Discovered by:	Louis Vauquelin
Year:	1797
Place:	France
Sources:	Chromite [Fe,Mg(CrO4)] is its most important mineral. Produced commercially by heating its ore in the presence of silicon or aluminium.
Use(s):	Used to make stainless steel. It gives the color to rubies and emeralds. Iron-nickel-chromium alloys in various percentages yield an incredible variety of the most important metals in modern technology.