1.

Which of the following has maximum number of unpaired electrons ?

Answer»

`MG^(2+)`
`TI^(3+)`
`V^(3+)`
`FE^(2+)`

Solution :`Mg^(2+) : 1s^(2)2s^(2)2p^(6), Ti^(3+) = [Ar]`,
`V^(3+) = [Ar] 3d^(1) ""Fe^(2+): [Ar] 3d^(6)`
`therefore " "Fe^(2+)` has maximum number of upaired ELECTRONS i.e. 4


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