( besides the transition metals) the group shows charge with... 1, +1 charge ( loses to group 17) 2, +2 charge 13, +3 charge 14, ±4 charge ( depends on if this is a metal or nonmetal( metalloids are classified by which side of the staircase)) 15, -3 charge 16, -2 charge 17, -1 charge ( gains from group one ( halogens(17) and alkali metals (1) are highly reactive). 18, no charge (noble gasses are always full with valence electrons, thus have no charge and rarely form compounds.)
