The number of electrons with (n+l) values equal to 3, 4 and 5 in an element with atomic number (z) 24 are respectively (n= principal quantum number and l= azimuthal quantum number)

Atomic number, 24 belongs to Cr and its electronic configuration is 1s²2s²2p⁶3s²3p⁶3d⁵4s¹

n+l=3 (this means 2p and 3s orbital)=total 8 electrons.

n+l=4 (this means 3p and 4s orbital)=total 7 electrons

n+l=5 (this means 3p orbital)=total 5 electrons