Per NCERT Class 9 Science Ch 9, who proposed the ATOMIC THEORY in the early 19th century — providing the first scientific framework for atoms?
ARobert Hooke
BAntoine Lavoisier
CJoseph Proust
DJohn Dalton
Answer & Solution
Correct answer: D. John Dalton
Per NCERT §9.3, Dalton's atomic theory (1808) was the first modern scientific atomic framework. Lavoisier/Proust gave laws; Hooke discovered cells.
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