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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.
The number of neutron in tritium is : (1) 1 (2) 2 (4) 3 (4) 0 Ans: 2
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