The principal and azimuthal quantum numbers associated with a subshell are a and a 4, respec tively. Predict the shape of that subshelli f the shape of another subshell having azimuthal .quantum number a-5 is spherical. If that subshell is half filled, predict the atomic number of the element

Explanation

The shape of the subshell having azi1nuthal quan-tum number a - 5 is spherical. Hence, the value of a must be 5. Therefore, the subshell having principal and azimuthal quantum numbers a and (a - 4), that is, 5 and 1 is Sp. If Sp subshell is half-filled the , l electronic configuration is `[Kr]5s^24d^(10)5p^3` the atomic number of the element is 51. Sp orbital is f dumbbell shaped with two lobes.