Question

Electronic configuration of Mg is:

• A. $1s^{2}2s^1{p}^{5}3s^{2}3d^2$
• B. $1s^{2}2s^2{p}^{6}3s^2$
• C. $1s^{2}2s^2{p}^{7}3s^1$
• D. $1s^{2}2s^2{p}^{6}3s^2{p}^2$

Answer 1

The correct option is B $1s^{2}2s^2{p}^{6}3s^2$

Electronic configuration of Mg is $\left[Ne\right]3s^2$

Ne is $1s^{2}2s^2{p}^6$ .