The first ionisation energies of the elements of the first transition series `(TitoCu)`

Options

A. generally increases as the atomic numbers increase
B. decrease as the atomic number increase
C. do not show any change as the addition of electrons takes place in the inner (n-1)d-orbitals.
D. increase from Ti to Mn and then decrease from Mn to Cu.

Answer

A

Explanation

First ionisation energies of 3d-series (first transition sereis) increase with increase in atomic numbr due to (1) increase in nuclear charge (2) decrease in atomic size.