Why 5d transition series elements have higher ionization enthalpies than 4d transition series elements ?

The transition elements have high melting points.

Transition elements

Why do transition metals have high enthalpies of atomization ?

Why do the transition elements have higher enthalpies of atomisation? In 3d series (Sc to Zn), which element has the lowest enthalpy of atomisation and why?

The transition elements have a general electronic configuration of

The first ionisation energies of the elements of the transition series

Why the properties of the third transition series are very similar to the second transition series?

Why transition elements form a number of alloys ?