Which one of the following pairs of ions have the same electronic conf

1.	Which one of the following pairs of ions have the same electronic configuration
Answer» `Ti^(2+), V^(3+), CR^(4+) , MN^(5+)` `TI^(3+), V^(2+) , Cr^(3+), Mn^(4+)` `Ti^(4+) , V^(4+) , Cr^(6+) , Mn^(7+)` `Ti^(4+) , V^(3+) , Cr^(2+) , Mn^(3+)` Solution :`Ti^(2+) - [Ar] 4s^0 3d^2 , V^(3+) -[Ar] 4s^0 3d^2` `Cr^(4+) - [Ar] 4s^0 3d^2 , Mn^(5+) - [Ar] 4s^0 3d^2`

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