What are the values of $n$ and $l$ for the $f$-subshell with the lowest energy?

How many orbitals are present in a $g$ subshell?

The subshell that arises after $f$ is called $g$ subshell.
$(a)$ How many $g$ orbitals are present in the $g$ subshell?
$(b)$ In what principal electronic shell would the $g$ subshell first occur and what is the total number of orbitals in this principal shell?

Which of the following statements are correct?
$(A)$ The electronic configuration of $Cr$ is $[Ar] 3d^5 4s^1$.
$(B)$ The magnetic quantum number may have a negative value.
$(C)$ In the ground state of an atom, the orbitals are filled in order of their increasing energies.
$(D)$ The total number of nodes is given by $n-1$.
Choose the most appropriate answer from the options given below.

In the ground state of atomic $Fe \,(Z = 26)$,the spin-only magnetic moment is ...... $\times 10^{-1} \,BM$. (Round off to the nearest integer).
$[$Given $: \sqrt{3} = 1.73, \sqrt{2} = 1.41]$

On the basis of quantum numbers,justify that the sixth period of the periodic table should have $32$ elements.