How many of the following metal ions have similar value of spin only magnetic moment in gaseous state? ________ (Given: Atomic number : V , 23 ; Cr , 24 ; Fe , 26 ; Ni , 28 ) V 3 + , Cr 3 + , Fe 2 + , Ni 3 +

Step-by-step solution

From magnetic moment formula: μ s = n ( n + 2 ) BM    ( n = no. of unpaired electrons ) Ion E.C. n V 3 + : [ Ar ] 3   d 2 4   s 0       2 Cr 3 + : [ Ar ] 3   d 3 4   s 0     3 Fe 2 + : [ Ar ] 3   d 6 4   s 0     4 Ni 3 + : [ Ar ] 3   d 7 4   s 0       3 Thus, Cr 3 + & Ni 3 + have same value of μ s