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Chemistry
Chapter four
| Question | Answer |
|---|---|
| Democritus | called nature's basic particle an atom, meaning indivisible. It physically resembled the matter it made (furry atoms) |
| Aristotle | was much more influential and his opinion that matter could be infinitely divided prevailed for almost 2000 years: all matter was made of some combinations of 4 elements (earth, water, fire, air) |
| Aristotle and Democritus was a only a theory because... | there was no scientific testing; only opinions. |
| Dalton's Atomic Theory | John Dalton proposed that the elements were composed of atoms and only whole numbers of atoms can combine and form compounds |
| Modern Atomic theory | was a modification of Dalton's theory. stated that atoms are divisible and an element can have atoms with different masses |
| Dalton's Theory ideas | 1. element are composed of tiny indivisible particles called atoms 2. atoms of the same element are identical. Atoms of different elements are different. no dip. |
| Dalton's ideas con't | 3. different elements can physically mix together or combine. they can combine in whole-number ratio 4. chem. reactions occur when atoms separate, join, rearranged in a different combination |
Created by:
anegrich14
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