3/4 or 4/4 would be the answer because if you use 1/4 out of 4/4 you would either have an answer of 3/4, 4/4 or 1. The 1 because 4/4 is equal to 1.
Gaining electrons would mean that it is near the stable octet, so it needs more.
Right side would be the answer
The group 7A elements are called Halogens.
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Explanation:
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