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Experiments with gases that first became possible at the turn of the nineteenth century led John Dalton. He believed that Matter is made up of atoms that are indivisible and indestructible. All atoms of an element are identical.
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Elements are made of extremely small particles called atoms. Atoms are identical in size, mass, and other properties. atoms cannot be created, or destroyed
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Observations led John Dalton to study gases, and from the results of his experiments he was able to formulate his atomic theory.The first part of his theory states that all matter is made of atoms, which are indivisible.
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Dalton's atomic theory remains valid.All atoms of a given element are identical in mass and properties.atoms can be destroyed via nuclear reactions but not by chemical reactions.
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