Compounds are always composed of two or more elements
Course:- Chemistry
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Which of the following statements are part of John Dalton's atomic theory? I. All atoms of an element are identical in all ways. II. Compounds are random chemical combinations of several elements. III. Compounds are always composed of two or more elements. IV. Atoms of different elements are different. V. Isotopes have the same number of protons but a different number of neutrons.

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