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Question
Which of the following statements about the Modern Periodic Table is correct:
Options
It has 18 horizontal rows known as Periods
It has 7 vertical columns known as Periods
It has 18 vertical columns known as Groups
It has 7 horizontal rows known as Groups
Solution
It has 18 vertical columns known as Groups
Explanation -
The modern periodic table has 18 vertical columns known as Groups.
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