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Periodic Classification of Elements — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
MCQ
Mendeleev’s classification was based on $............$
  • ✓
    Increasing atomic mass
  • B
    Decreasing atomic number
  • C
    Increasing atomic number
  • D
    Decreasing atomic mass
✓

Answer

Correct option: A.
Increasing atomic mass

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