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Lanthanoids and actinoids are f-block el...

Lanthanoids and actinoids are f-block elements It is difficult to separate lanthanoids in the pure state. Explain.

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Lanthanoids have similar size due to lanthanoid contraction. They all have similar outer electronic arrangement. So these elements are almost similar in their chemical properties and hence the separation of individual lanthanoid elements is difficult.
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A N EXCEL PUBLICATION-D AND F - BLOCK ELEMENTS-QUESTION BANK
  1. Lanthanides and actinoids are f-block elements What is the common oxi...

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  2. Lanthanoids and actinoids are f-block elements Name the lanthanoid ha...

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  3. Lanthanoids and actinoids are f-block elements It is difficult to sep...

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  4. Transition metals are widely used as catalysts in industrial processes...

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  5. Transition metals are widely used as catalysts in industrial processes...

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  6. Transition metals are widely used as catalysts in industrial processes...

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  7. Atomic sizes generally increase as we come down a group of the periodi...

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  8. E^@ (standard electrode potential) values generally become less negati...

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  9. Transition elements are d-block elements, with some exceptions. Usuall...

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  10. Transition elements are d-block elements, with some exceptions. Usuall...

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  11. Which of the 3d series of elements exhibits the largest number of oxid...

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  12. Transition elements are d-block elements, with some exceptions. Usuall...

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  13. Describe the method of preparation of potassium dichromate from chromi...

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  14. Write any one consequence of lanthanoid contraction.

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  15. Transition elements are d- block elements Write any four characteristi...

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  16. Account for the following: Atomic radius decreases from left to right ...

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  17. Account for the following trends in atomic and ionic radii of transiti...

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  18. Account for the following trends in atomic and ionic radii of transiti...

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  19. Lanthanides and actinoids are f-block elements What is the common oxi...

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  20. Name two important compounds of transition elements.

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