Rubidium possesses a single valence electron in the s-orbital of the atom’s fifth energy level. Rubidium contains 37 electrons in total, as seen by its electron configuration of 1s2 2s2p6 3s2p6d10 4s2p6 5s1.
On the periodic table, rubidium is represented by the chemical symbol Rb. It has the atomic number 37 and belongs to the alkali metals group of elements. Rubidium atoms have an atomic radius of 2.98 angstroms and an ionic radius of 1.52 angstroms. Rubidium contains 48 neutrons in its most common state and a charge of +1 in its ionic state.
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