Periodic Table GroupsOnline version Understanding the groups of the periodic table by Graylen Boone 1 Metals 2 Non-metlas 3 Metalloids 4 Group with 1 valence Electron 5 Group with 2 valence Electron 6 Group with 3 valence Electron 7 Group with 4 valence electron 8 Group with 5 valence electron 9 Group with 6 valence electron 10 Group with 7 valence electrons 11 Group with 8 valence electrons (besides He) 12 Period with 2 energy levels 13 period with 3 energy levels