Question: What charge does a calcium ion most often have? a) +3 b) +2 c) 2 d) +1 e) 1 Question 4 (1 point) How many

What charge does a calcium ion most often have? a) +3 b) +2 c) 2 d) +1 e) 1 Question 4 (1 point) How many valence electrons does a neutral Cl atom have? 6 7 2 5 3 4 1

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