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10 Cards in this Set
- Front
- Back
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Dalton's Atomic Model |
Atoms are indestructible and indivisible |
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Thomson' Atomic Model |
Electrons are embedded in the positively charged atom (cathode ray tube experiment) |
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Rutherford's Atomic Model |
Discovered nucleus - Gold foil experiment Shoot alpha particles into gold foil Particles deflected significantly - Positive nucleus, rotating electrons If the electrons are rotating, then they should be losing energy and getting closer to and crashing into the nucleus, causing the atom to not exist. |
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Bohr's Atomic Model |
-Electrons orbit at stable, stationary states without energy loss - There are district energy levels - The frequency of light, rather than the amount determines its ability to dislodge electrons |
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Heisenberg's Uncertainty Principle |
Potion and velocity of an electron cannot be measured accurately at the same time Measuring one decreases the accuracy of the other |
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Quantum Model of the Atom |
Through measurement/data analysis, one can determine the probability of an electron being in a given area |
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The Photoelectric Effect |
Electrons in a material can be ejected when struck with high intensity light. |
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Intensity of Light |
Brightness - Physicists originally thought that this was a factor |
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Frequency |
(Colour) - This is a factor. (ie. Blue > Red) |
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Quanta |
Light is not waves - it is a packet/quanta of energy/photons. (ie. High frequency = High Quanta) |
