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Question Bank [2022] — Chemistry STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryQuestion Bank [2022]3 Marks
Question
Write any two properties actinides.
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Answer

Properties of actinides:
  1. Similar to lanthanoids, they appear silvery-white in colour.
  2. These are highly reactive radioactive elements.
  3. Except promethium (Pm), all are nonradioactive in nature.
  4. They experience decrease in the atomic and ionic radii from actinium (Ac) to lawrencium (Lr), known as actinoid contraction.
  5. They usually exhibit +3 oxidation state. Elements of the first half of the series usually exhibit higher oxidation states.

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