What is the older group numbering system that IUPAC replaced? - CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROP Quiz | GKFix.in

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What is the older group numbering system that IUPAC replaced?

A. 1 to 7
B. A to Z
C. Group I to Group X
D. IA to VIIA, VIII, IB to VIIB, 0

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