Question

Which one of the following does not belongs to group 14?
1. $\left[He\right]2s^1$ 2. $\left[He\right]3s^2$ 3. $\left[He\right]2s^{2}2p^2$ 4. $\left[Ne\right]3s^{2}3p^1$

• A. 1,2,4
• B. 2,3,4
• C. 1,3,4
• D. only 2, 4

Answer 1

The correct option is A 1,2,4

1. $\left[He\right]2s^1$ is electronic configuration of Li which belong to group 1.
2. $\left[He\right]3s^2$ is electronic configuration of Be which belong to group 2.
3. $\left[He\right]2s^{2}2p^2$ is electronic configuration of C which belong to group 14.
4. $\left[Ne\right]3s^{2}3p^1$ is electronic configuration of Al which belong to group 13.
Hence correct option is a.