Among ( CrO , Cr ₂ O ₃ ) and ( CrO ₃ ), the sum of spin-only magnetic moment values of basic and amphoteric oxides is _______ (10⁻² BM ) (nearest integer). (Given atomic number of ( Cr ) is 24)

Step-by-step solution

CrO Basic oxide Cr ₂ O ₃ Amphoteric oxide In CrO , Cr exist as Cr ⁺² and have only =4.90 In Cr ₂ O ₃, Cr exist as Cr ⁺³ and have only =3.87 Sum of spin only magnetic moment aligned & =4.90+3.87=8.77 & _ only =877 10⁻² aligned Ans. 877