The maximum number of electrons accommodated in $5f$ orbitals are

The magnetic quantum number $m_l$ is determined by the azimuthal quantum number $l$. If $l = 2$,what are the type and number of orbitals indicated?

Match the entries in Column $I$ with the correctly related quantum number$(s)$ in Column $II$.

Column $I$	Column $II$
$A$. Orbital angular momentum of the electron in a hydrogen-like atomic orbital	$p$. Principal quantum number
$B$. $A$ hydrogen-like one-electron wave function obeying Pauli principle	$q$. Azimuthal quantum number
$C$. Shape,size and orientation of hydrogen-like atomic orbitals	$r$. Magnetic quantum number
$D$. Probability density of electron at the nucleus in hydrogen-like atom	$s$. Electron spin quantum number

Consider the electronic configuration for neutral atoms:
$(i) \ 1s^22s^22p^63s^1$ $(ii) \ 1s^22s^22p^64s^1$
Which of the following statements is/are false?
$(a)$ Energy is required to change $(i)$ to $(ii)$
$(b)$ $(i)$ represents $Na$ atom
$(c)$ $(i)$ and $(ii)$ represent different elements
$(d)$ More energy is required to remove one electron from $(i)$ than $(ii)$

Explain how the energy of an orbital and the extent of shielding in the same shell depend on the shape of the orbitals.

How many total orbitals are present in the $4f$ subshell?