Give the symbol of the element with the lowest atomic number that has three $2p$ electrons.

How many electrons can be accommodated in a sub-shell for which $n = 3, l = 1$?

The five valence electrons of $P^{15}$ are labeled as $A, B, X, Y, Z$ as shown in the figure. If the spin quantum number of $B$ and $Z$ is $+\frac{1}{2}$,identify the group of electrons that share three identical quantum numbers.

Which of the following sets represents degenerate orbitals?

The number of $d$ electrons in $Fe$ is equal to which of the following?
$i$. Total number of '$s$' electrons of $Mg$
$ii$. Total number of '$p$' electrons of $Cl$
$iii$. Total number of '$p$' electrons of $Ne$
The correct option is

$d_{z^2}$ orbital has :