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Chromium  SEE PERIODIC TABLE
see article  SEE FULL ARTICLE


Atomic Number24

Atomic SymbolCr

Atomic Weight51.9961 amu

GroupTransition, 6

FormSolid

Density @ STP7.15 g/cm3

Melting Point1907 °C (3464.6 °F, 2180.2 °K)

Boiling Point2671 °C (4839.8 °F, 2944.2 °K)

Heat of Fusion21.0 kJ/mol

Heat of Vaporization339 kJ/mol

First Ionization Potential6.76664 eV

Electronegativity (on Pauling scale)1.66

Specific Heat Capacity0.449 J/g K

Ground State Electron Configuration3d5 4s1

Oxidation States+2, +3, +6

Stable Isotopes and Natural Abundance on Earth50Cr, 4.345%; 52Cr, 83.789%; 53Cr, 2.365%; 54Cr, 2.365%

Selected Radioisotopes51Cr

Atomic Radius166 pm

Crystal StructureCubic

Discovered byVauquelin, 1797

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