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7 Cards in this Set
- Front
- Back
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John Dalton |
He told that all matter was made of atoms, and building blocks that couldn’t be destroyed or divided. |
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J.J Thompson |
He discovered that cathode rays were negatively charged. He also studied positively charged particles in neon gas. |
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Ernest Rutherford |
He found that an a atom is mostly made of empty space. It’s mass is concentrated in the nucleus. |
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Niels Bohr |
Electrons move around the nucleus but only in orbits. When moving from one orbit to another with lower energy, a light quantum is formed. |
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Werner Heissenberg |
He created the uncertainty principle that shows that a particle's position and moment cannot be known exactly. |
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James Chadwick |
He discovered the neutrons in the atoms. Neutrons are at the center of the atom. They have or positive and negative charge. |
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Ernest Schrodinger |
He discovered a new atom model called the quantum mechanical model of the atom. |
