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| negatively charged, smaller than a proton. Was discovered by Thompson in 1981. One of the smallest particles. They surround the nucleus |
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| Made of protons, neutrons, and electrons. Democrities, Dalton believed everything was built of tiny indestructible things (atoms). |
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| said atoms have 7 energy levels. |
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| Gold Leaf Oil experiment. Believed that atoms have a hard dense center. And that atoms are mostly made out of space. He believed atoms have electrons. |
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| Electron Cloud Model- best cloud model that corresponds with an atom. It is the most current. The creators used math to figure out where the electron could be. |
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| Neutrons + protons are in the nucleus and electrons surround the nucleus |
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