Question: how many valence electrons does rb (rubidium) have?
Answer: Rubidium has one valence electron, which is located in the s-orbital of the atom's fifth energy level. Rubidium has a total of 37 electrons, illustrated in the element's electron configuration of 1s2 2s2p6 3s2p6d10 4s2p6 5s1. As there is only 1 electron in Rubidium's valence shell, Rubidium's valency is 1.