In the modern periodic table, there are :

(More than one option are correct)

18 groups

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18 periods

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7 periods

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7 groups

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Solution

The correct option is C 7 periods
In the modern periodic table, there are 18 groups and 7 periods. Elements are arranged in rows and columns. The horizontal rows are known as periods while the vertical columns are known as groups.

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Similar questions

(a) State the modern periodic law.

(b) How many periods and groups are there in the modern periodic table?

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