Question

Which has an electron configuration $1s^{2}2s^{2}2p^{6}3s^{2}3p^1$?

• A. $N{a}^{+}$
• B. $Al$
• C. $F$
• D. $Ti$
• E. $B$

Answer 1

The correct option is B $Al$

Option $\left(A\right)$ is correct.

$Al$ has an electron configuration $1s^{2}2s^{2}2p^{6}3s^{2}3p^1$.Atomic no. of aluminium is 13.