Question

How many valence electrons does each member of the boron family have?

Answer 1

All five have three electrons in their outer energy level. Only one member of this family is a metalloid -- boron.

Answer 2

Three Electrons

Every element in the boron group has three electrons in its outermost shell (so-called valence electrons), and for each element there is a sharp jump in the amount of energy required to remove the fourth electron, reflecting the fact that this electron must be removed from an inner shell.