What is the element has five 4p valence electrons? what ion will it
form?
2 answers
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5 = 35 electrons and 35 protons for neutral atom. Must be Br. Will form Br^- by adding 1 electron to make 36.
Thank you very much!