Total number of unpaired electrons in an atom of atomic number $29$ is

The quantum numbers $n$ and $l$ for four electrons are given as: $(1) \, n = 4, l = 1; \, (2) \, n = 4, l = 0; \, (3) \, n = 3, l = 2; \, (4) \, n = 3, l = 1$. Arrange them in increasing order of their energy.

When the value of the principal quantum number $n$ is $3$,what are the permitted values of the azimuthal quantum numbers $l$ and the corresponding magnetic quantum numbers $m$?

An element has an atomic number of $17$. The number of orbitals containing electron pairs in the valence shell will be .......

Which of the following orbitals are degenerate? $3d_{xy}, 4d_{xy}, 3d_{z^2}, 3d_{yz}, 4d_{yz}, 4d_{z^2}$

For an electron in $2s$ and $2p$ orbitals,the orbital angular momentum values,respectively,are $:$