Question

Which part of Dalton's original atomic theory must be modified with the discovery of isotopes?

(a) Compounds are formed when elements enter into chemical reactions

(b) Atoms combine with other atoms in whole number ratios to form compounds

(c) Matter is composed of atoms

(d) All atoms of a given element are identical​

Answer 1

Answer:-

Atoms combine with other atoms in whole number ratios to form Compounds

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Answer 2

Answer:

(d) All atoms of a given element are identical.