Q. What is the number of groups and periods in the modern periodic table?
A) 18, 8
B) 18, 7
C) 16, 8
D) 16, 7
✔ Correct Answer: 18, 7
Exam Insight
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A) 18, 8
B) 18, 7
C) 16, 8
D) 16, 7
✔ Correct Answer: 18, 7
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