everyday science MCQ #49601

How many periods are there in the modern periodic table?

everyday science MCQ #49601

  1. Question 1

    Q1. How many periods are there in the modern periodic table?

    • A) 6
    • B) 7
    • C) 8
    • D) 9

    Answer: 7

    Explanation: The modern periodic table has 7 horizontal rows called periods, corresponding to the 7 principal energy levels (electron shells) occupied by elements currently known.