In an element with atomic number $(Z) = 25$,the number of electrons with $(n+l)$ value equal to $3$ and $4$ are $x$ and $y$ respectively. The value of $(x+y)$ is

An atom of an element contains $29$ electrons and $35$ neutrons. Deduce
$(i)$ the number of protons and
$(ii)$ the electronic configuration of the element.

$Ge$ $(Z=32)$ in its ground state electronic configuration has $x$ completely filled orbitals with $m_{l}=0$. The value of $x$ is ..... .

Which of the following sets of quantum numbers is not possible?

Which of the following statements are true?
$(A)$ The subsidiary quantum number $\ell$ describes the shape of the orbital occupied by the electron.
$(B)$ The image shows the boundary surface diagram of the $2p_x$ orbital.
$(C)$ The $+$ and $-$ signs in the wave function of the $2p_x$ orbital refer to charge.
$(D)$ The wave function of the $2p_x$ orbital is zero everywhere in the $yz$ plane.

The maximum number of electrons that can be accommodated in all orbitals with quantum numbers $n = 3$ and $l = 2$ is $......$.