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RUBIDIUM (37Rb85.4678)

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Element Description

Rubidium is a soft, silvery-white metal belonging to the alkali group. It is second in the categories of most electropositive and most alkaline elements. Rubidium forms amalgams with mercury and alloys with gold, cesium, sodium, and potassium. It is highly reactive; igniting spontaneously in air and reacting vigorously in water. Rubidium has a high heat capacity and heat transfer coefficient.

Property Name Property Value Property Name Property Value
Atomic Code (37Rb85.4678) Atomic Volume 55.9W/D
CAS # 7440-17-7 First Ionization Energy 96K-cal/g-mole
Electronegativity 0.8Pauling's
Melting Point 39°C Covalent Radius 2.16Angstroms
Boiling Point 688°C Mohs Hardness @ 20°C 0.3
Density 1.532g/cm3 Electrical Resistivity 12.1µΩ-cm
Specific Heat @ 25°C 0.033cal/g°C Crystal Structure Cubic, body centered
Heat of Fusion 6.14k-cal/g-atom Thermal Neutron Cross Section 0.73barns/atom
Heat of Vaporization 212k-cal/g-atom Electron Work Function 2.09eV


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