Explain the following observations:(i) Generally there is an increase in density of elements from titanium (Z = 22) to copper (Z = 29) in the first series of transition elements.(ii) Transition elements and their compounds are generally found to be good catalysts in chemical reactions.

Explain the following observations:(i) Generally there is an increase

1.	Explain the following observations:(i) Generally there is an increase in density of elements from titanium (Z = 22) to copper (Z = 29) in the first series of transition elements.(ii) Transition elements and their compounds are generally found to be good catalysts in chemical reactions.
Answer» (i) The density of elements from titanium to copper increase in the first series of transition elements. This is due to decrease in metallic radius coupled with increase in atomic mass results in a general increase in the density. (ii) Many transition metals and their components show catalytic properties. This property is due to their ability to exhibit variable oxidation states (incomplete d-orbitals) which enable them to form unstable intermediates.

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Explain the following observations:(i) Generally there is an increase in density of elements from titanium (Z = 22) to copper (Z = 29) in the first series of transition elements.(ii) Transition elements and their compounds are generally found to be good catalysts in chemical reactions.

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