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Question

In the modern periodic table, there are ___

A
18 groups
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B
18 periods
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C
7 periods
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D
7 groups
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Solution

The correct options are
A 18 groups
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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