Chemistry · Periodic Classification
How many groups and periods were there in the original Mendeleev's periodic table?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 17 groups and 9 periods
- 28 groups and 7 periods
- 39 groups and 9 periods
- 49 groups and 7 periods✓
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9 groups and 7 periods
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