The total value of magnetic quantum number for $n = 4$ is:

The number of atomic orbitals from the following having $5$ radial nodes is $.......$. $7s, 7p, 6s, 8p, 8d$

$A$ subshell with $l = 2$ is called?

Which of the following is violating Hund's rule?

Which of the following combinations of statements is true regarding the interpretation of atomic orbitals?
$1$. An electron in an orbital of high angular momentum stays further away from the nucleus than an electron in an orbital of lower angular momentum.
$2$. For a given value of the principal quantum number, the size of the orbit is inversely proportional to the azimuthal quantum number.
$3$. According to wave mechanics, the ground state angular momentum is equal to $\frac{h}{2\pi}$.
$4$. The plot of $\Psi$ vs $r$ for various azimuthal quantum numbers shows the peak shifting towards higher $r$ values.

How many unpaired electrons will be present in the ground state of an atom which has valence electronic configuration $3d^6$ in its $+3$ oxidation state?