Question

Electronic configuration of $M{g}^{+2}$ is identical with?

• A. Ne
• B. Na
• C. N
• D. O

Answer 1

The correct option is A Ne

${Mg}^{+2}$

Atomic number of Mg = $12{1s}^2{2s}^2{2p}^6{3s}^2$

${Mg}^{+2}$ means $2$ electrons removed, then electronic configuration is

${1s}^2{2s}^2{2p}^6$

Atomic number 10 is neon.

So ${Mg}^{+2}$ is identified with Neon.