Question

A group is determined by the number of electrons present in the outermost shell. For example : Sodium has atomic number 11 and its electronic configuration is 2, 8, 1. It has one electron in the outermost orbit hence it is placed in group 1. Similarly, magnesium, atomic number 12, electronic configuration 2, 8, 2 is placed in group 2​

Answer 1

Explanation:

Magnesium has atomic number 12. It will be distributed in K, L, M shell in the following way:

K shell can accommodate a maximum of 2 electrons.

L shell can accommodate a maximum of 8 electrons and

M shell will accommodate 2 electrons

So the configuration becomes 2,8,2.

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Answer 2

Answer:

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