How many valence electrons do all elements in group 2 of the periodic table?

they have 2 valence electrons, group 1 have 1 valance e-, group 2 have 2 e-, group 3-12 is depends on the chemical, group 13 have 3 e-, group 14 have 4 e-, group 15 have 5 e-, group 16 have 6 e-, group 17 have 7 e- and noble gases have 8 e-