Short Answer TypeComment on the statement that elements of the first transition series possess many properties different from those of heavier transition elements.
Mention the direct consequence of the following factors on the chemical behaviour of the transition elements.
(i) They have in completely filled d-orbitals in the ground state or in one of the oxidised states of their atoms.
(ii) They contribute more valence electrons per atom in the formation of metallic bonds?
Explain the following facts:
Transition metals acts as catalyst.
Transition metals acts as catalyst due to the following reasons:
(i) Their partially empty d-orbitals provide surface area for reactant molecules.
(ii) They combine with reactant molecules to form transition states and lowers their activation energy.
(iii) They show multiple oxidation states and by giving electrons to reactants they form complexes and lower their energies.
Explain the following facts:
Chromium group elements have highest melting points in their respectively series.
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