Chemistry - f-block Question with Solution | TestHub

Transition metals have high enthalpies of atomization, because they form strong metallic bonds, due to participation of (n – 1) d-electrons along with ns-electrons in metallic bonding.
This due to the greater effective nuclear charge acting on outer valence electrons, because of weak shielding of nucleus by 4f-electrons
The normal size increase from Zr to Hf is almost exactly balanced by lanthanide contraction
Because of small size, atoms of H, He, C, N occupy the vacant spaces in the crystal lattice of transition metal.