Question

Please please tell me the right answer

Answer 1

here's the answer I think it may help you
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Answer 2

Number of electrons in Mg  - 12
As we go down a group , the number of shells increases and the effective nuclear charge on the electrons decreases making the element easy to loose electrons. So the mettalic charter increases down a group.
From left to right in a period , the effective nuclear charge on electrons increases making the element smaller in size while going towards the right end of a period. Due to this , it becomes hard for the elements to loose electrons, but can gain electrons. Hence the metallic charter increases.

Hope it helps.