• Group 1A: forms ions with +1 charge
• Group 2A: forms ions with +2 charge
• Group 3A: forms ions with +3 charge
Which of the following sets contains elements that will form ions with a charge of 2-?
a) As, P, and N
b) Te, S, and O
c) Si, P, and S
d) Sr, Ca, and Be
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