Why enthalpy of atomisation `Zn` is the lowest in the first transition series ?

Define enthalpy of atomisation.

Account of the following. (i) The enthalpy of atomisation is lowest for Zn in 3d -series of the transition elements. (ii) Identify the metal in MO_(3)F and justify your answer. (iii) Transition metals form a large number of complexes. (iv) d^(1) configuration is very unstable in ions.

Compare the stability of +2 oxidation state for the elements of the first transition series.

Fill in the blanks : The only metal which has a positive standard reduction potential in the first transition series is ……..

To what extent do the eletronic configuration decide the stability of oxidation states in the first series of the transition elements ? Illustrate your answer with examples.

How would you account for the irregular variation of ionisation enthalpies (first and second) in the first series of the transition elements ?