The set of quantum numbers $n = 3$,$l = 0$,$m = 0$,$s = -1/2$ belongs to the element

"Pairing of electrons in the orbitals belonging to the same subshell does not occur unless each orbital belonging to that subshell has got one electron each." This statement is known as

After filling the $4d$ orbitals,an electron will enter in:

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

If there are $2$ nodal surfaces in the third excited state,find the orbital angular momentum.

In which of the following,orbitals are correctly arranged in the increasing order of their energies?