$A$ certain orbital has $n = 4$ and $m_{L} = -3$. The number of radial nodes in this orbital is .......... (Round off to the Nearest Integer).

The set of principal $(n)$,azimuthal $(l)$ and magnetic $(m_l)$ quantum numbers that is not allowed for the electron in $H$-atom is

In a given atom,no two electrons can have the same values for all the four quantum numbers. This is called:

What is the difference between the $2s$ orbital of hydrogen and the $2s$ orbital of other multi-electron atoms?

Given below are two statements. One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$ : Energy of $2s$ orbital of hydrogen atom is greater than that of $2s$ orbital of lithium.
Reason $R$ : Energies of the orbitals in the same subshell decrease with increase in the atomic number.
In the light of the above statements,choose the correct answer from the options given below.

Which of the following statements concerning the four quantum numbers is false?