The number of $2p$ electrons having spin quantum number $s = - 1/2$ is

What is the meaning of degenerate orbitals?

Explain Hund's rule of maximum multiplicity.

The electrons identified by quantum numbers $n$ and $l$ :
$A. n=4, l=1$ $B. n=4, l=0$
$C. n=3, l=2$ $D. n=3, l=1$
can be placed in order of increasing energy as :

An electron has principal quantum number $n = 3$. The number of its $(i)$ sub-shells and $(ii)$ orbitals would be respectively:

Which of the following sets of quantum numbers is consistent with the rules of quantum mechanics?