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| Democritus was a philsopher who first discovered the atom. |
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| What did he believe about the atom? |
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Definition
| He believed that all matter consisted f extremely small particles that could not be divided.He thought there were different types of atoms with specific set of properties. |
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| Where does the work atom come from and what does it mean? |
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Definition
| It comes from the greek work atomos. It means uncut and indivisible. |
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Definition
| Aristotle was another greek philosopher |
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Definition
| He thought that there wasnt a limited number of times matter could be divided. |
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| was born in England in 1766.He was teacher who spend his spare time doing scientific experiments. |
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Term
| What was his evidence for atoms? |
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Definition
| To get his evidence he measured the masses of elements that combine when compounds form.He noticed that all compounds have something in common. |
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Term
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Definition
- All elements are composed of atoms
- All atoms of the same element, have the same mass, and atoms of different elements have different masses.
- compounds contain atom of more that one element.
- In a particular compound atoms of different elements, always combine in the same way. |
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Term
| What was Daltons main point in his theory? |
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Definition
| That all matter is made up of individual particles called atoms, which cannot be divided |
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