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Cards In This Set
| Front | Back |
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Dalton
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Atomic Theory
Described chemical reactions but no description of atoms |
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Thomson
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Discovered electron
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Rutherford
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Discovered nucleus and proton
Planetary model |
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Three problems
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Blackbody radiation
Photoelectric effect Spiral inward |
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Electromagnetic radiation
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The emission and transmission of energy in the form of electromagnetic waves
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Order of waves
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Gamma
X-rays UV rays Visible rays Infrared Microwave Radio |
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Gamma rays
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Produced in nuclear reactions
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X-rays
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Produced in nuclear reactions highly excited atoms
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Ultraviolet rays
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Produced by excited atoms/molecules long term exposure harmful
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Visible
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Useful to humans
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Infrared
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Comunication devices, causes molecules to rotate
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Radio
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Not easily absorbed can pass through buildings
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Blackbody Radiation
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Electricity and magnetism are linked
Hot object glows Max Planck Assumed light was quantized |
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Photoelectric effect
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Light shines on a metal an electric current is produced
Frequency of light determines if/when current begins |
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Emission
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Electron moving from higher to lower n emits photon with change in E
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