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The horizontal rows in Mendeleev’s periodic table were called as __________

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in Chemistry – Class 11 by (148k points)
The horizontal rows in Mendeleev’s periodic table were called as __________

(a) periods

(b) groups

(c) series

(d) rows

I have been asked this question during an online interview.

I want to ask this question from Modern Periodic Law and the Present Form of the Periodic Table in portion Classification of Elements and Periodicity in Properties of Chemistry – Class 11

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Correct choice is (c) series

The explanation: A Russian chemist named Dmitri Mendeleev classified elements based on chemical and physical properties in ascending order of their atomic weights. The number of groups was 8 (vertical columns) and there were 12 series (horizontal rows).

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