The four quantum numbers for the valence shell electron of Sodium $(Z=11)$ are:

What is the total number of orbitals present in $N$ shell?

Given:
$(A)\ n = 5, m_l = +1$
$(B)\ n = 2, l = 1, m_l = -1, m_s = -1/2$
The maximum number of electron$(s)$ in an atom that can have the quantum numbers as given in $(A)$ and $(B)$ are respectively:

If the quantum number values for the valence shell electron of an atom are $n = 4, l = 0, m = 0$,then the atomic number of the element could be .........

From which principal quantum number $(n)$ do the $s, p, d,$ and $f$ orbitals start? Describe them.

Which of the following are correct?
$(1)$ Electron density in $XY$ plane for $d_{x^2-y^2}$ orbital is zero.
$(2)$ The energy of $3p$-orbital is higher than the energy of $2p$-orbital.
$(3)$ $3p_z$-orbital has one angular node.
$(4)$ $4f$-orbital has no radial node.