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Periodic Classification of Elements — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
MCQ
Mendeleev classified elements in :
  • A
    Increasing order of atomic groups.
  • ✓
    Seven periods and eight groups.
  • C
    Seven periods and nine groups
  • D
    Eight periods and seven groups.
✓

Answer

Correct option: B.
Seven periods and eight groups.
Mendeleev kept elements in increasing order of atomic weights in seven periods and eight groups.

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