Explain the following observations: (i) Generally, there is an incr...

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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.
P
\( W \)
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