Question

Which of the following is an incorrect electronic configuration in ground state?

• A. $\text{Boron:}\left[He\right]2s^{2}2p^1$
• B. $\text{Aluminium:}\left[Ne\right]3s^{2}3p^2$
• C. $\text{Galium:}\left[Ar\right]3d^{10}4s^{2}4p^1$
• D. All of the above.

Answer 1

The correct option is B $\text{Aluminium:}\left[Ne\right]3s^{2}3p^2$

Electronic configuration of elements:

$\text{Boron:}\left[He\right]2s^{2}2p^1$
$\text{Aluminium:}\left[Ne\right]3s^{2}3p^1$
$\text{Galium:}\left[Ar\right]3d^{10}4s^{2}4p^1$
$\text{Indium:}\left[In\right]4d^{10}5s^{2}5p^1$

Option (b) is correct.