1.

Which of the following ions show higher spin only magnetic moment value?

Answer»

`Ti^(3+)`
`MN^(2+)`
`Fe^(2+)`
`CO^(3+)`

Solution :`Ti^(3+) = [Ar]3d^(1)`
`Mn^(2+)=[Ar] 3d^(5), (t_(2G)^(3)e_(g)^(2))`
`Fe^(2+)=[Ar]3d^(6)(t_(2g)^(4)e_(2g)^(2))`
`Co^(3+)=[Ar] 3d^(6)(t_(2g)^(6)e_(g)^(0))`
Crystal field SPLITTING energy (CFSE) is high in `Co^(3+)`, thus electrons pair up in `t_(2g)`. Hence, only `Fe^(2+)` and `Mn^(2+)` show HIGHER spin magnetic moment value.


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