Highly selective Backlog Qs for JEE MainChemistryStructure of Atom
Spin only magnetic moment 2.84 B M is given by: (Atomic Number of Ni = 28 , Ti = 22 , Cr = 24 , Co = 27 )
Options
- ANi 2 +
- BTi 3 +
- CCr 2 +
- DCo 2 +
Correct answer
A. Ni 2 +
Step-by-step solution
μ = n ( n + 2 ) = 2.84 ⇒ n = 2 electronic configuration of Ni + 2 = 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 8 e − having two unpaired electrons electron configuration of T i 3 + = 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 1 only one unpaired electron electron configuration of C r 2 + = 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 4 having four unpaired electrons electron configuration of C o + 2 = 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 3 d 7 having three unpaired electrons.