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Home > 4. Chemistry and Physics > Elements and Compounds
Podcast: 4. Chemistry and Physics
Episode:

Elements and Compounds
Category: Science & Medicine
Duration: 00:00:43
Publish Date: 2011-07-13 19:24:09
Description: Transcript: Dalton reached his theory of atoms by experimenting with gasses using entirely homemade equipment. For example, he deduced that air is not a uniform substance but is composed of a mixture of gases, primarily nitrogen and oxygen. He showed that a single gas corresponds to a chemical element, and he showed that gases combined in fixed proportions to form compounds. For example, hydrogen and oxygen combine explosively to form steam or water, and the proportions are always one part hydrogen to eight parts oxygen by weight.
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