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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 Properties1 Mark
MCQ
Atomic weight of which set of elements were corrected by Mendeleev?
  • A
    Li, Na, K
  • B
    U, Be, In
  • C
    Tc, Sc, Al
  • D
    None of the these
✓

Answer

  1. U, Be, In

Explanation:

Mendeleev corrected atomic weights of Uranium, Beryllium, and Indium ( U, Be, In ) based on their positions in the periodic table. Along with that he also corrected the atomic weights of Gold ( Au ) and Platinum ( Pt ).

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