1) 1. how many periods do we have a) 18 b) 19 c) 7 2) how many groups do we have in periodic table a) 18 b) 19 c) 7 3) __________ found in rows a) period b) group 4) __________ found in column a) group b) period

Leaderboard

Visual style

Options

Switch template

Continue editing: ?