The maximum number of electrons that can be accommodated in $f-$ shell is:

Given below are the quantum numbers for $4$ electrons.
$A. \; n = 3, l = 2, m_l = 1, m_s = +1/2$
$B. \; n = 4, l = 1, m_l = 0, m_s = +1/2$
$C. \; n = 4, l = 2, m_l = -2, m_s = -1/2$
$D. \; n = 3, l = 1, m_l = -1, m_s = +1/2$
The correct order of increasing energy is

Which electronic configuration does not follow the $(n + l)$ rule?

Which of the following sets of quantum numbers is not possible?

The quantum number $m$ of a free gaseous atom is associated with

Which orbital is closer to the nucleus: $2p$ or $3p$?