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Periodic Classification of Elements — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
MCQ
The arrangement of elements in the Modem Periodic Table is based on their :
  • A
    Increasing atomic mass in the period.
  • ✓
    Increasing atomic number in the horizontal rows.
  • C
    Increasing atomic number in the vertical columns.
  • D
    Increasing atomic mass in the group.
✓

Answer

Correct option: B.
Increasing atomic number in the horizontal rows.

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