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RubidiumRb Electron 1 Electron 2 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 9 Electron 10 Electron 11 Electron 12 Electron 13 Electron 14 Electron 15 Electron 16 Electron 17 Electron 18 Electron 1 Electron 2 Electron 3 Electron 4 Electron 5 Electron 6 Electron 7 Electron 8 Electron 1

Rubidium is a chemical element with symbol Rb and atomic number 37. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, such as very rapid oxidation in air.

37 Atomic Number
85.47 Atomic Mass (u)
312.79 Melting Point (K)
961 Boiling Point (K)
1.53 Density (solid: g/cm³, gas: g/liter)
3 Atomic Radius (Å)
2.2 Covalent Radius (Å)
0.82 Electronegativity
4.18 First Ionization Energy (eV)
46.88 Electron Affinity
5 Number of Shells
1 Electron Valency
2, 8, 18, 8, 1 Electron Shell Occupations
0.36 Specific Heat (J/g)