Q.

How many vertical columns are there in the long form of the periodic table?

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a

20

b

15

c

18

d

25

answer is D.

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Detailed Solution

Vertical columns are known as 'groups' in the periodic table. The Modern periodic table (Refer to the image) which is also known as the long form of the periodic table has 18 vertical columns.

Hence, 18 groups are there in the long form of the periodic table.

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