An electron having quantum numbers $n = 4, l = 3, m = 0, s = -1/2$ is present in which orbital?

What are the values of $n$ and $l$ for the $f$-subshell with the lowest energy?

Write down about the electron spin quantum number $(s)$.

The quantum number which explains the line spectra observed as doublets in the case of hydrogen and alkali metals, and doublets and triplets in the case of alkaline earth metals is:

On what does the energy of hydrogen and hydrogen-like species depend? On what does it not depend?

The set of principal $(n)$,azimuthal $(l)$ and magnetic $(m_l)$ quantum numbers that is not allowed for the electron in $H$-atom is