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Under the 1984 IUPAC recommendation, the element groups are numbered how?
A1 to 8
B0 to 8
C1 to 16
D1 to 18
Answer & Solution
Correct answer: D. 1 to 18
IUPAC replaced the old IA to VIIA, VIII, IB to VIIB and 0 labels with plain numbers 1 to 18.
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