RUBIDIUM

 RUBIDIUM (37) (Solid)  86(18.7 days)B-  87(480,000,000,000 years)B-

Atomic radius:2.98Deg. A (Quantum mech. value for a free atom)

Atomic volume:55.9 cm(3)/mol at 300Deg. Kelvin

Atomic weight:85.4678 (Based on Carbon 12)

Boiling point:961Deg. Kelvin

Covalent radius:2.16Deg. A

Crystal structure:Cubic,body centered

Density:1.53 g/cm(3) at 300Deg. Kelvin

Electrical conductivity:.0779 10(x6) Ohm(x.1) cm(x.1) at 293Deg. Kelvin

Electron configuration:1s(2)2s(2)p(6)3s(2)p(6)3d(10)4s(2)p(6)5s(1)

Electronegativity:.82 (Pauling's)

First ionization potential:4.177 V

Heat of fusion:2.192 kJ/mol at melting point

Heat of vaporization:72.216 kJ/mol at boiling point

Melting point:312.64Deg. Kelvin

Oxidation states:1 very basic

Specific heat capacity:.363 Jg(x.1) K(x.1) at 300Deg. Kelvin

Thermal conductivity:.582 W cm(x.1) K(x.1) at 300Deg. Kelvin

Description:A soft,silvery metallic element that decomposes water with violence

and bursts into flame spontaneously in air.

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