The $3p$ orbital has ........

If the $n^{th}$ specific period of the periodic table contains $\frac{(n+2)^2}{2}$ elements,then the maximum value of the azimuthal quantum number associated with that period is:

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

Which of the following statement$(s)$ is/are wrong?

Magnetic and spin quantum number of an electron are $-1$ and $+1/2$ respectively. This electron cannot be in

The maximum number of electrons in a $P$ orbital with $n = 6$ and $m = 0$ is ......