Identify the $M g^{2 +}$ ion from the figure where, n and p represent the number of neutrons and protons respectively.

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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 $M g^{2 +}$ . $M g^{2 +}$ 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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