JEE Main Chemistry question

Which one of the following combinations represents a metallic element?

(A)2, 8, 2Correct
(B)2, 8, 4
(C)2, 8, 7
(D)2, 8, 8

Answer: (A)

Solution

The configuration 2, 8, 2 has only 2 electrons in the outermost shell, which are easily lost to attain a stable octet, giving the element strong metallic (electropositive) character, as in Mg.

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Question ID VK-133291