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Transition and Inner Transition Elements — Chemistry STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryTransition and Inner Transition Elements2 Marks
Question
What are rare earths?
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Answer

  • Lanthanoids or 4f-block elements are called rare earths.
  • Lanthanoids are never found in free state, and their minerals are not pure.
  • They exhibit similar chemical properties hence cannot be extracted and separated by normal metallurgical processes.
  • Lanthanoid metals are available on small scale. Therefore they are called rare earths.

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