The number of orbitals associated with quantum numbers $n=5, m_s=+\frac{1}{2}$ is

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

For the configuration shown in the image,which rule is violated $:-$

The correct order of energy of $2s$-orbitals in $H$,$Li$,$Na$ and $K$ is:

If the nitrogen atom had electronic configuration $1s^7$,it would have energy lower than that of the normal ground state configuration $1s^2, 2s^2, 2p^3$ because the electrons would be closer to the nucleus. Yet,$1s^7$ is not observed because it violates:

For which of the following sets of four quantum numbers,an electron will have the highest energy?
$n$ $l$ $m$ $s$