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John Dalton's Atomic Theory

The first major theory on how matter works

David Rollison

on 1 October 2012

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Transcript of John Dalton's Atomic Theory

John Dalton's Atomic Theory Dalton used the works of other
scientists Collaborations! He was a philosopher
and naturalist in the early 1800's John Dalton's Job Atoms are small solid spheres Dalton's Five Atomic Principles The late 1700's began the era known as the Age of Enlightenment. This is the beginning of scientific thought and exploration Science RULES!!!! Discovered the Law of Definite Proportions:
Two samples of a given compound are always made of the same elements in the same proportions Joseph Proust Discovered the Law of Conservation on Mass:
The theory that the mass of reactants in a reaction will always equal the mass of the products Antoine Lavoisier Discovered the Law of Multiple Proportions:
If two or more compounds are made of the same elements, the ratio of the masses will always be whole numbers John Dalton (same guy) Dalton's first thoughts on the atom Elements Compounds Elements are made of the
same type of atom Compounds are made of 2 or more
different types of atoms These atoms cannot be subdivided, created or destroyed All matter is made of extremely small particles called atoms Atoms of a given element are
identical in their physical
and chemical properties Atoms of different elements differ
in their physical and chemical
properties Atoms of different elements
combine in simple, whole-number
ratios to form compounds In chemical reactions, atoms are combined, separated, or rearranged, but never created, destroyed, or changed All of this led to. . .
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