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Classification of Elements and Periodicity in Properties — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistryClassification of Elements and Periodicity in Properties2 Marks
Question
Define:
  1. Metallic radius.
  2. Van der Waals' radius.
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Answer

  1. Metallic radius is half the distance between centres of nuclei of two atoms of metal held together by metallic bond.
  2. Van der Waals' radius is half of the distance between centres of nuclei of two atoms held by weak van der Waals' forces of attraction.

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