Definition and History of Atoms WK1 (2)

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12 Terms

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Atoms
All matter is composed of?
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Indivisible
Atoms comes from the Greek word "Atomos" meaning?
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Democritus
Who was among the 1st to suggest the existence of atoms
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Indivisible and indestructible
Democritus believed that atoms were?
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John Dalton
To whom did the modern atomic though began?
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Experimental methods
How did Dalton transform Democritus' idea of atoms into scientific theory?
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Dalton's Atomic Theory
Dalton studied the ratios in which elements combine and what was the result?
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In 1808
When did John Dalton propose the Atomic Theory?
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Law of Conservation of Matter
States that matter cannot be created or destroyed, but changed only in form.
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Law of Definite Proportions
A give compound always contains elements in a certain proportion by mass. (Constant composition)
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Law of Multiple Proportions
If two elements form more than one single compound, the masses of one element combine with a fixed mass of the second are in the ration of small numbers.
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Atoms
According to Dalton's Atomic Theory, elements are made of particles called what?