MCQ practice · SSC Chemistry Board questions · Chapter 4: Periodic Table
How many horizontal rows did Mendeleev's periodic table have?
Think it through first, then pick an option.
- a 7
- b 8
- c 12
- d 18
Answer and explanation
Correct answer: c 12
Mendeleev's chart had 12 horizontal rows.
Why the other options are wrong
- a 7: 7 is the number of periods in the modern table. The answer is 12.
- b 8: 8 was the number of vertical columns in Mendeleev's chart. The answer is 12.
- d 18: 18 is the number of groups in the modern table. The answer is 12.
More board questions on this topic
- What was the basis of Mendeleev's periodic table?
- How many columns did Mendeleev's first periodic table have?
- How many horizontal rows were there in Mendeleev's periodic table?
- With how many discovered elements did Mendeleev make his periodic…
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