What is the number of radial and angular nodes in a $5f$ orbital?

Identify the correct statements among the following:
$i. E_{2s}(H) > E_{2s}(Li) < E_{2s}(Na) > E_{2s}(K)$
$ii.$ The maximum number of electrons in the shell with principal quantum number $n$ is equal to $2n^2$.
$iii.$ Extra stability of half-filled subshell is due to smaller exchange energy.
$iv.$ Only two electrons,irrespective of their spin,may exist in the same orbital.

There is no difference between a $2p$ and $3p$ orbital regarding ?

In which of the following orbital diagrams are both Pauli's exclusion principle and Hund's rule violated?

The number of waves made by an electron moving in an orbit having a maximum magnetic quantum number $(m_l) = 3$ is:

What is the total spin for the electronic configuration of fluorine $(F)$?