begin mathsize 48px style mu equals square root of n left parenthesis n plus 2 right parenthesis end root end style

μ = Magnetic Moment ;  n = Number of unpaired electron;

begin mathsize 48px style mu subscript e f f end subscript space equals space 2.83 space square root of capital chi subscript M T end root space B. M end style

μeff = Magnetic Moment ; XM = Molar Suseptibility ; T =Temperature ; B.M= Bohr Magneton