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Chemistry · Classification of Elements and Periodicity in Properties
हिन्दीIn the modern periodic table, the groups are numbered from 1 to 18 according to the recommendation of:
Correct answer · Option 2
International Union of Pure and Applied Chemistry (IUPAC)
Explanation
According to the recommendation of the International Union of Pure and Applied Chemistry (IUPAC), groups are numbered from 1 to 18.
