Four successive elements of the first transition series are given with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?

Misch metal is an alloy of $:-$

Which of the following metals forms more than one chloride?

Which element from the following exhibits the lowest number of different oxidation states?

Identify the components of the alloy known as German Silver.

Compare the general characteristics of the first series of the transition metals with those of the second and third series metals in the respective vertical columns. Give special emphasis on the following points:
$(i)$ electronic configurations,
$(ii)$ oxidation states,
$(iii)$ ionisation enthalpies,and
$(iv)$ atomic sizes.