Chemistry - Complete d-block Question with Solution | TestHub
Pick out the correct statement set for transition metals
They form interstitial compounds
5d-elements have higher energies than 3d or 4d-elements
Zr and Hf have almost identical atomic and ionic radii
They have low melting and boiling points (or low enthalpies of atomization)
Options:
Answer:
Solution:
Here statement 1, 2 and 3 are correct as follows
Because small size, atoms of H, C, N occupy the vacant spaces in the crystal lattice of transition metal.
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
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.