alleryHow many groups (vertical columns) are there in the modern periodic table?
A7
B8
C16
D18
Answer & Solution
Correct answer: D. 18
1. The vertical columns of the periodic table are called groups.
2. The modern periodic table arranges all elements into these columns.
3. There are 18 groups in total.
The value 7 is the number of periods, not groups.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 8 Periodic Classification of Elements "Features of Groups", p.116_
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