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in The d and f Block Elements by (36.2k points)
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(a). Hf and Zr have similar ionic radii though they belongs to the 3rd and 4th transition series. Explain the reason for the anomalous behaviour.

(b). MnO4- & MnO42- are the ions of manganese. They differ in colour and magnetic nature.

1. How do this difference occured? 

2. Support your answer with their structure.

1 Answer

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(a) This is a consequence of lanthanide contraction.

(b) Differ in colour and magnetic nature.

1. This is due to difference in number of electrons in d- subshell.

2.

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