Which property of d-block elements accounts for their catalytic activity, high melting points, and ability to form interstitial compounds?

💡 Solution & Explanation

Transition metals exhibit variable oxidation states and possess vacant d-orbitals that allow them to form temporary coordinate bonds with reactants, lowering activation energy barriers and acting as effective catalysts. Complete s-orbital filling characterizes alkaline earth metals rather than d-block transition elements. High electronegativity is typical of non-metals in the p-block. Large atomic radii with low ionization energies describe alkali metals.