What are the total number of electrons present in $s$ and $p$ orbitals respectively in the ground state of an argon atom $(Z = 18)$?

Identify the correct statement.

All electrons in the $4p$ sub-shell must be characterized by which of the following quantum numbers?

For which of the following orbitals is the value of $(n + l)$ maximum?

The angular part of the wave function for an orbital is given by $\psi_{(\theta, \phi)} = \left( \frac{15}{4\pi} \right)^{1/2} \sin \theta \cos \theta \sin \phi$,where $\theta$ is the angle from the $z$-axis. The angular node$(s)$ are:

What is the maximum number of electrons accommodated in a subshell having azimuthal quantum number,$\ell=2$?