Group 2- Alkaline Earth Metals, Group 7- Halogens, Group 8-Noble gases, Magnesium, Group 1- Alkali Metals , most reactive metal in Group 1, A period 5 element, Proton number 6, Calcium, Potassium, Oxygen, An element with 6 energy levels (shells).

Leaderboard

Visual style

Options

Switch template

Continue editing: ?