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Name the main ores of lanthanoids?...

Name the main ores of lanthanoids?

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ASSAM ACADEMIC CENTRE-The d and f-block elements-Example
  1. What are coinage elements?

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  2. What is the number of unpaired electrons in Fe^(2+) ion (ferrous ion)?

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  3. What are the colours of Fe^(2+).

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  4. Name a transition element which does not exhibit variable oxidation st...

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  5. What is the number of unpaired electrons in Fe^(2+) ion (ferrous ion)?

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  6. Which of the two is paramagnetic V(IV) and V(V) and why?

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  7. Which one is more paramagnetic: Fe^(2+) or Fe^(3+) (Z = 26)? Give reas...

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  8. Mn (II) shows maximum paramagnetic character amongst the divalent ions...

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  9. What are lanthanoids?

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  10. Write electronic configuration of Fe^(2+) and Cr^(3+).

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  11. Write electronic configuration of Ni^(2+) and Cu^(2+).

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  12. Which oxidation state of Mn is most stable and why?

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  13. Name three elements which are d-block elements but not transition elem...

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  14. What are interstitial compounds? Mention principla physical and chemic...

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  15. Give reason: among transition metals, the highest oxidation state is e...

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  16. Write the general electronic configuration of f-block elements.

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  17. Write the general electronic configuration of lanthanoids and actinoid...

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  18. Name a member of the lanthanoid series which is known to exhibit +4 ox...

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  19. Name the main ores of lanthanoids?

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  20. One unpaired electron has a magnetic moment of 1.1 BM. Calculate the m...

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