COBALT

 COBALT (27) (Solid)

Atomic radius:1.67Deg. A (Quantum mech. value for a free atom)

Atomic volume:6.7 cm(3)/mol at 300Deg. Kelvin

Atomic weight:58.9332 (Based on Carbon 12)

Boiling point:3201Deg. Kelvin

Covalent radius:1.16Deg. Kelvin

Crystal structure:Hexagonal

Density:8.9 g/cm(3) at 300Deg. Kelvin

Electrical conductivity:.172 10(6) Ohm(x.1) K(x.1) at 293Deg. Kelvin

Electron configuration:1s(2)2s(2)p(6)3s(2)p(6)3d(7)4s(2)

Electronegativity:1.88 (Pauling's)

First ionization potential:7.86 V

Heat of fusion:16.19 kJ/mol at melting point

Heat of vaporization:367.5 kJ/mol at boiling point

Melting point:1768Deg. Kelvin

Oxidation states:2,3 Amphoteric(3)

Specific heat capacity:.42 Jg(x.1) K(x.1) at 300Deg. Kelvin

Thermal conductivity:1.0 W cm(x.1) cm(x.1) K(x.1) at 300Deg. Kelvin

Description:A tough,lusterous,silver-white,magnetic metallic element that is

related to and occurs with iron and nickel,and is used especially in alloys.

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