Give reasons for the following : (a) Transition metals have high enth

1.	Give reasons for the following : (a) Transition metals have high enthalpies of atomization. (b) Manganese has lower melting point even though it has a higher number of unpaired electrons for bonding. (c) Ce4+ is a strong oxidizing agent.
Answer» (a) Transition elements have a large number of valence electrons and high effective nuclear charge. Due to this they form very strong metallic bonds. As a result of this the enthalpy of atomization of transition metals is high. (b) Complex structure of metal crystal is responsible for this abnormal behaviour of manganese. (c) Ce⁴⁺(4f ⁰ ) in + 4 oxidation state tend to revert to the more stable oxidation state of + 3 by gain of an electron so it behaves as strong oxidising agent.

Give reasons for the following : (a) Transition metals have high enthalpies of atomization. (b) Manganese has lower melting point even though it has a higher number of unpaired electrons for bonding. (c) Ce4+ is a strong oxidizing agent.

Answer»

(a) Transition elements have a large number of valence electrons and high effective nuclear charge. Due to this they form very strong metallic bonds. As a result of this the enthalpy of atomization of transition metals is high.

(b) Complex structure of metal crystal is responsible for this abnormal behaviour of manganese.

(c) Ce⁴⁺(4f ⁰ ) in + 4 oxidation state tend to revert to the more stable oxidation state of + 3 by gain of an electron so it behaves as strong oxidising agent.

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Give reasons for the following : (a) Transition metals have high enthalpies of atomization. (b) Manganese has lower melting point even though it has a higher number of unpaired electrons for bonding. (c) Ce4+ is a strong oxidizing agent.

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