Which of the following orbitals has a dumbbell shape?

In an atom,the total number of electrons having quantum numbers $n=4, |m_{l}|=1$ and $m_{s}=-\frac{1}{2}$ is:

Which orbital is represented by the wave function $\Psi_{310}$?

The order of filling of electrons in the orbitals of an atom will be

What will be the maximum number of electrons in any atom having quantum numbers $n = 4, l = 2, m = -2$?

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: