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Uploaded by Laura Sanchez on 2015-03-04.

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Atoms were infinite in number, always moving and capable of joining together.

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Proposed the first idea of the atom: substances made up of tiny indestructible, invisible particles called "atoms."

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Timeline of the atomic theory.

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11 Scientists who contributed to the Atomic Theory

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According to Isaac Newton.

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1704, Isaac Newton theorized a mechanical universe with small, solid masses in motion.

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According to Aristotle, these are the four elements.

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Aristotle did not believe in the atomic theory and he taught so otherwise. He thought that all materials on Earth were not made of atoms, but of the four elements, Earth, Fire, Water, and Air. He believed all substances were made of small amounts of these four elements of matter.

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Atomic theory is what scientists have come to recognize as the explanation of how matter and energy cooperate to produce the elements and and their properties.