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Which of the following atoms has a full outer shell? A. Ca B. Li-1 C. Mg+2 D. N-2
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1 vote
Which of the following atoms has a full outer shell?

A. Ca
B. Li-1
C. Mg+2
D. N-2

User Baramin
by
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1 Answer

5 votes

Magnesium ( Mg+² ) has a full outer shell .

Reason:-

K and L shells of an atom are full , then it will have a total of 2 + 8 = 10 electrons in it . We know that magnesium has 12 electrons in it . Magnesium having 2 free electrons.

User Anduril
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