The maximum number of electrons in a subshell is given by the expression:

Which set of quantum numbers for an electron of an atom is not possible?

Find the number of electrons in the ground state of $Pd$ $(Z = 46)$ with $l = 2$.

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

Two electrons $A$ and $B$ in an atom have the following set of quantum numbers:
$A: n=3, l=2, m_l=-2, m_s=+1/2$
$B: n=3, l=0, m_l=0, m_s=+1/2$
What is true for $A$ and $B$?

According to the Aufbau principle,which of the three $4d$,$5p$,and $5s$ will be filled with electrons first?