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== == Atoms were inferred to exist from the observation of "Brownian motion," which is the jittering of dust particles in air or water or some medium as seen through a microscope. The jitter is supposed to be caused by random collisions of atoms or molecules with the dust particles. If the medium were not composed of particles but were a smooth creamy substance without lumps, there would be nothing to make the dust particles jitter.

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โˆ™ 2009-01-17 17:12:19
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Who is known as the first African American scientist

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Q: What property of a particle led to the discovery of the atom?
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