The starting materials consist of two green spheres and two purple spheres. Does the following chemical change represented by these symbols violate any of the ideas of Dalton’s atomic theory? If so, which one? If the spheres touch, they are part of a single unit of a compound. The purple spheres represent atoms of another element. In the following drawing, the green spheres represent atoms of a certain element. A macroscopic sample of an element contains an incredibly large number of atoms, all of which have identical chemical properties.
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