Question

Choose the correct electronic configuration for silicon atom.

• A. $1s^{2}2s^{2}2p^{6}3p^4$
• B. $1s^{2}2s^{2}2p^{6}3s^{2}3p^2$
• C. $1s^{2}2s^{2}2p^{6}3s^2$
• D. $1s^{2}2s^{2}2p^{6}3s^{2}3p^1$

Answer 1

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

Silicon $\left(\text{Si}\right)$ has $14$ electrons, and they are distributed in $s$ and $p$ orbitals as $1s^{2}2s^{2}2p^{6}3s^{2}3p^2$.

Hence, option $\left(D\right)$ is the correct answer.