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(a) SWhich of the following statements about the Modern Periodic Table is correct: (a) It has 18 horizontal rows known as Periods (b) It has 7 vertical columns known as Periods (c) It has 18 vertical columns known as Groups It has 7 horizontal rows known as Groups

ScienceClass 10CBSEAnswered 27 Mar 2026
Answer
  • Soln:

Answer is (c) It has 18 vertical columns known as Groups

Explanation:

Modern periodic table have 18 groups and 7 periods. Columns are called groups and rows are called priods.

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