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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|
|Melting Point||39°C||Covalent Radius||2.16Angstroms|
|Boiling Point||688°C||Mohs Hardness @ 20°C||0.3|
|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|