The orbital angular momentum of an electron in a $d-$orbital is $:-$

Which orbital is represented by the wave function $\Psi_{310}$?

Choose the pair whose ions have the similar electronic configuration.

The graph between $|\psi|^2$ and $r$ (radial distance) is shown below. This represents

$A$ filled or half-filled set of $p$ or $d$-orbitals is spherically symmetric. Point out the species which has spherical symmetry.

If the nitrogen atom had electronic configuration $1s^7$,it would have energy lower than that of the normal ground state configuration $1s^2, 2s^2, 2p^3$ because the electrons would be closer to the nucleus. Yet,$1s^7$ is not observed because it violates: