RADIUM

 RADIUM (88) (Solid)  226(1,600 years)A

Atomic radius:

Atomic volume:45.2 cm(3)/mol at 300Deg. Kelvin

Atomic weight:226.0254 (Based on Carbon 12)

Boiling point:1809Deg. Kelvin

Covalent radius:

Crystal structure:Cubic,body centered

Density:5 g/cm(3) at 300Deg. Kelvin

Electrical conductivity:

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

4f(14)5d(10)6s(2)p(6)7s(2)

Electronegativity:.9 (Pauling's)

First ionization potential:5.279 V

Heat of fusion:

Heat of vaporization:

Melting point:973Deg. Kelvin

Oxidation states:2 very basic

Specific heat capacity:

Thermal conductivity:.186 W cm(x.1) K(x.1) at 300Deg. Kelvin

Description:An intensely radioactive,shining white metallic element that

resembles barium chemically,occurs in combination in minute quantities in

minerals(as in pitchblende and carnotite) emits alpha particles and gamma rays

to form radon,and is used chiefly in luminous materials and the treatment of

cancer.

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