$1s^2 2s^2 2p^6 3s^2$ is the electronic configuration of the metal

The maximum number of possible electrons in a subshell with $n=3$ and $l=2$ is

Which of the following orbitals is not possible (in $f$)?

$Ge$ $(Z=32)$ in its ground state electronic configuration has $x$ completely filled orbitals with $m_{l}=0$. The value of $x$ is ..... .

The correct decreasing order of energy for the orbitals having the following set of quantum numbers:
$A$. $n=3, \ell=0, m=0$
$B$. $n=4, \ell=0, m=0$
$C$. $n=3, \ell=1, m=0$
$D$. $n=3, \ell=2, m=1$

How many orbitals are present in the $4^{th}$ shell with $\ell = 2$?