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Question

Identify the Mg2+ ion from the figure where, n and p represent the number of neutrons and protons respectively.


A

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B

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C

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D

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Solution

The correct option is D


The atomic number of Mg is 12 and atomic mass is 24, so the number of protons (p) = 12 and number of neutrons (n)=12.

When 2 electrons are removed from the Mg atom, we get Mg2+. Mg2+ has a total of 10 electrons (2, 8).

The electronic configuration of Magnesium ion is K=2 and L=8.

Hence,


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