MCQ practice · SSC Chemistry Board questions · Chapter 4: Periodic Table
How many periods are there in the periodic table?
Think it through first, then pick an option.
- a 6
- b 7
- c 8
- d 9
Answer and explanation
Correct answer: b 7
The periodic table has 7 periods.
Why the other options are wrong
- a 6: Not 6; the table has 7 horizontal rows. The answer is 7.
- c 8: 8 were Mendeleev's vertical columns. The answer is 7.
- d 9: No table in the book has 9 periods. The answer is 7.
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