In Case of a `""_(15)X` atom, five valence electrons are `overset(3x)(AB)overset(3p)(PQR)`. If the spin quantum number of B and R is `+(1)/(2)` then find the group(s) of electrons with three of the quantum numbers same.

Explanation

Spin quantum number of 'R' is given as `+(1)/(2)` and hence that of 'P' and 'Q' will also be `+(1)/(2)`. Electrons P,Q and R are in 3p-orbital, so their n and l values i.e., principal and azimuthal quantum numbers will also be same. Therefore, P,Q and R form a group having three quantum numbers same. both A and B belong to 3s having the value of n=3, l=0 and m=0. Hence they also have values of three quantum numbers same.