Gilbert Newton Lewis (0ct.23,1875-Mar.23,1946) An American physical Chemist Lewis Dot Symbols Valence electrons 18 1A 8A 2 13 14 15 16 17 3A 4A 5A 6A 7A He: Be B -N- 0 :Ne: 4 5 6 7 8 Na -Mg 3 91011 12 .P 3B 4B 5B 6B 7B —8B 1B 2B -AI-.SI- A K Ca Ga Ge.As.se.:Br. K Rb Sr .In..sn.sb.fe.:1. :Xe: Cs .Ba. TI..Pb..Bi.Po.At. :Rn: Fr Ra 2 345678Valence Electrons Gilbert Newton Lewis (Oct. 23, 1875 – Mar. 23, 1946) An American physical Chemist 1 2 3 4 5 6 7 8