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Democritus
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Democritus
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Atom
The atom is the smallest unit of ordinary matter that retains its chemical identity, consisting of a nucleus of protons and neutrons surrounded by electrons. Ancient atomists proposed indivisible particles moving in void; John Dalton made the idea quantitative…
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James Chadwick
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AtomThe atom is the smallest unit of ordinary matter that retains its chemical identity, consisting of a nucleus of protons and neutrons surrounded by electrons. Ancient atomists proposed indivisible particles moving in void; John Dalton made the idea quantitative…