Question

what is the spin multipliciry of B2 and how it calculate​

Answer 1

Answer:

The spin multiplicity is the number of possible orientations (calculated as '2S+1') of the spin angular momentum corresponding to a given total spin quantum number (S), for the same spatial electronic wave-function. S=0 and 2S+1 = 1. A doublet state has S=1/2 and 2S+1 = 2 etc.

Explanation: