Chemistry Question from JEE Main 2025 · 8 April, Shift 2

Correct statements for an element with atomic number $9$ are

A. There can be $5$ electrons for which $m_s = +\frac{1}{2}$ and $4$ electrons for which $m_s = -\frac{1}{2}$

B. There is only one electron in $p_z$ orbital.

C. The last electron goes to orbital with $n = 2$ and $l = 1$.

D. The sum of angular nodes of all the atomic orbitals is $1$.

Choose the correct answer from the options given below: