Per NCERT, what does Dalton's theory say about atoms of the SAME element?
AAtoms of the same element have no shared properties
BAtoms of the same element always have different masses
CAtoms of the same element exist in pairs only
DAtoms of the same element are identical in mass and chemical properties (although modern science now recognises isotopes)
Answer & Solution
Correct answer: D. Atoms of the same element are identical in mass and chemical properties (although modern science now recognises isotopes)
Per NCERT §9.3, Dalton: same-element atoms = identical in mass + chemical properties. Modern isotope discoveries refine this but Dalton's core idea stands.
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