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Which of the following statements about the Modern Periodic Table is correct?

A. It has 18 horizontal rows known as Periods 

B. It has 7 vertical columns known as Periods 

C. It has 18 vertical columns known as Groups. 

D. It has 7 horizontal rows known as Groups.

1 Answer

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In the modern periodic table it consists of 18 vertical columns known as Groups and 7 horizontal rows known as periods. According to this definition, only option (c) matches.

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