The elements of which group in the periodic table release the most energy by gaining an electron?
the elements of which group in the periodic table absorb the most energy when gaining an electron?

Below are the answers:

The elements of which group in the periodic table release the most energy by gaining an electron - Group 7A (one away from being full)

The elements of which group in the periodic table absorb energy when gaining an electron - Group 8A, the noble gasses because they have high electron affinity

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