What is the atomic theory
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"Nothing comes from nothing" is an important idea in ancient Greek philosophy that argues that what exists now has always existed, since no new matter can come into existence where there was none before. This article explains the theories that Dalton used as a basis for his theory: The theory explains several concepts that are relevant in the observable world: the composition of a pure gold necklace, what makes the pure gold necklace different than a pure silver necklace, and what occurs when pure gold is mixed with pure copper.
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John Dalton (1766-1844) is the scientist credited for proposing the atomic theory. But how far can this exercise be taken, at least in theory? Can one continue cutting the aluminum foil into halves forever, making smaller and smaller pieces? Or is there some limit, some absolute smallest piece of aluminum foil? Thought experiments like this-and the conclusions based on them-were debated as far back as the fifth century BC. It should be obvious that the pieces are still aluminum foil they are just becoming smaller and smaller. Continue cutting, making smaller and smaller pieces of aluminum foil. Cut one of those smaller pieces in half again. Now there are two smaller pieces of aluminum foil. Explain how all matter is composed of atoms.