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Democritus had the theory that all things were made of super small units called atoms. He said that they are everywhere
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He said that all things were made of atoms and that if 2 of them combined that they made a compound. He believed that they were indestructible.
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He created the Periodic Table.
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He discovered positive particles and he realized that each positive electron had a negative charge.
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He discovered electrons. He also discovered electric discharges by using a high vacuum cathode-ray tube
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He used the gold experiment and then he shot alpha particles through it then most of them went through the gold foil which tells us that most of the mass of an atom is concentrated into a small area.
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Determined how to determine the charge of electrons
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Discovered that electrons orbited nucleus in atoms
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Created the quantum theory
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Created the Uncertainty Principle:
- You can never know the exact location of an electron
- You can never know the exact amount of energy it produces -
He bombarded beryllium atoms with alpha particles. He found a unknown radiation which was the nuetron
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He created an equation for tracking electron movements.
