POTASSIUM

POTASSIUM (19) (Solid)  40(1.28 10(x9)years)EC  42(12.36 hours)B-
Atomic radius:2.77Deg. A (Quantum mech. value for a free atom)
Atomic volume:45.46 cm(3)/mol at 300Deg. Kelvin
Atomic weight:39.0983 (Based on Carbon 12)
Boiling point:1032Deg. Kelvin
Covalent radius:2.03Deg. A
Crystal structure:Cubic,body centered
Density:0.86 cm(3)/g at 300Deg. Kelvin
Electrical conductivity:0.139 10(x6) Ohm (x.1) K(x.1) at 293Deg. Kelvin
Electron configuration:1s(2)2s(2)p(6)3s(2)p(6)4s(1)
Electronegativity:0.82 (Pauling's)
First ionization potential:4.341 V
Heat of fusion:2.334 kJ/mol at melting point
Heat of vaporization:79.87 kJ/mol at boiling point
Melting point:336.35Deg. Kelvin
Oxidation states:1,very basic
Specific heat capacity:.75 Jg(x.1) K(x.1) at 300Deg. Kelvin
Thermal conductivity:1.024 W cm(x.1) K(x.1) at 300Deg. Kelvin
Description:A silver-white,light,soft,low-melting,univalent metallic element of
the alkali group,it occurs abundantly in nature especially combined in minerals.

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