TEAS 7 Chemistry! You would likely NOT get a periodic table for this question. So you need to understand what the group number represents. The group number that is labeled with the letter A tells you how many valence electrons an atom has. So, in this case, we are in group 2, so the atom has two valence electrons. If the atom were to form an ion, it would lose those two electrons instead of trying to gain six electrons. Therefore, this ion would have a 2 charge. #at#atiteast#atiteas7e#teas7e#tea