Which of the following orbitals are possible: $1p, 2s, 2p, 3f$?

Which of the following $p, d, f$ orbitals are not possible? Why?

The number of angular and radial nodes of $4d$ orbital respectively are

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

The number of electrons with $(n+\ell)$ values equal to $3, 4$ and $5$ in an element with atomic number $(Z) = 24$ are respectively $(n =$ principal quantum number and $\ell =$ azimuthal quantum number).

In the ground state of $Cr$,the number of electrons with $l = 1$ and $l = 2$ in its electronic configuration are respectively: