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Periodic Classification of Elements — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
MCQ
The modern periodic table has been divided into :
  • ✓
    Seven periods $-$ three short and four long.
  • B
    Nine periods $-$ six short and three long.
  • C
    Eighteen periods $-$ ten short and eight long.
  • D
    Nine periods from zero to $\ce{VII}$
✓

Answer

Correct option: A.
Seven periods $-$ three short and four long.
Seven Periods; three short period and four long period.

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