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Ad valencyInternal structure? When?at are they made up on1. From which experiments was it discovered that atoms have​

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Democritus

Around 450 B.C., the GREEK philosopher Democritus introduced the idea of the atom. However, the idea was essentially forgotten for more than 2000 years. In 1800, John Dalton re-introduced the atom. He provided evidence for atoms and DEVELOPED ATOMIC theory.



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