For $n = 5$ and $m = 2$,which of the following statements is incorrect?

The extra stability of half-filled subshells is due to:
$(A)$ Symmetrical distribution of electrons
$(B)$ Smaller coulombic repulsion energy
$(C)$ The presence of electrons with the same spin in non-degenerate orbitals
$(D)$ Larger exchange energy
$(E)$ Relatively smaller shielding of electrons by one another
Identify the correct statements.

The number of unpaired electrons in $1s^2 2s^2 2p^3$ is:

Which quantum number provides information about the shape of an orbital?

Which of the following orbitals represents $3d_{z^2}$ orbitals?

The electronic configuration of neon is