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Assign reason for each of the following statements : (i) The largest number of oxidation states are exhibited by the elements in the middle of the first row transitoin elements. (ii) The atomic radii decrease in size with the increasiing atomic number in the lanthanoid series. |
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Answer» SOLUTION :(i) The maximum number of oxidation STATES are shown by that element in a TRANSITION series which has maximum number of unpairedelectrons. This is so in the middle of the series. (ii) Refer to PASE ( cause of lanthanoid contraction) |
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