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The number of particles in something depend upon what that substance is. A cm is simply a measurement in one dimension only and, by itself, does not tell us enough information to answer how many particles there are.

If, for example, you asked how many particles are there in 1cm3 of uranium then an answer could be provided.

As this question is posted under maths and not physics, it could be that you have used the word "particles" incorrectly. A cm is equal to 10mm if that is what you wish to know.

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13y ago

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