1.

The atomic number of vanadium `(V)`, chromium `(Cr)`, manganese `(Mn)` and iron `(Fe)` are respectively `23,24,25,26`. Which out of these may be expected to have the jump in second ionisation enthalpy?A. `Mn`B. `Fe`C. `V`D. `Cr`

Answer» Correct Answer - D
`Cr` has `3d^(5), 4s^(1)`, configuration and thus second electron is removed from `3d`- subshell. Rest all from `4s`- subshell.


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