Question

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Answer 1

Answer:

The symbol of outermost shell of magnesium is M and the outermost shell has 2 electrons

Explanation:

Let us take a look at the electronic configuration of magnesium

It is 2,8,2.

We know, that the symbol of the first shell is K and the second shell is L. So, continuing, we have the third shell having symbol M.

The electrons in the outermost shell of an atom is called VALENCE ELECTRONS.

From the electronic configuration, we can see that it is 2. The last number is 2