Element 18 find A.valence electron B.valency Share with your friends Share 0 Sakthi Jeeva answered this Here is the answer 0 View Full Answer Balaji Sankapal answered this Given- At. No = 18 1. Valence electrons -- Electronic configuration is - 2,8,8 (by Bohr and Bury 's theory) There valence electrons =8 2.Valency =0 (as outermost shell is fully filled) -1 Manasi Raskar answered this valence electron-2,8,8. its valency is 0 because the shells are completly fill 1