Identify degenerate orbitals from the following for a hydrogen atom.

$A$: No two electrons in an atom can have the same set of all four quantum numbers.
$R$: Two electrons in an atom can exist in the same shell,subshell,or orbital only if they have opposite spins.

The electronic configuration $1s^2, 2s^2 2p^5, 3s^1$ represents:

What is the total number of orbitals associated with the principal quantum number $n = 3$?

Give the order of energy of orbitals in a multi-electron atom.

Which one of the following electronic arrangements is absurd?