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15 Cards in this Set
- Front
- Back
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Definition of Ground State (of an atom)
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electron in its innermost orbital, atom at lowest possible energy
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Definition of excited state (of an atom)
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atoms energy increased, one or more electrons move outward into larger orbital
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Definition of Electronic Transition
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electrons move between orbitals
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Definition of Photon
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particles that make up light
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Definition of Blackbody
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object that absorbs all the radiation falling on it
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Definition of electromagnetic spectrum
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entire range of electromagnetic waves
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Definition of wavelength
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spacing b/c wave crests
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frequency
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number of wave crests that pass a given point in 1 second
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doppler effect
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change in wavelength caused by motion
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thermal radiation
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electromagnetic emission that occurs when photons have higher energy when the material is hotter and total radiation produced increases rapidly
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List the waves in the electromagnetic spectrum in order from longest to shortest
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radio, microwave, infrared, visible light, ultraviolet, x-rays, gamma rays
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3 types of spectrum
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continuous, emission-line, absorption line
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using Krchhoff's laws, explain how the three types of spectrums are formed
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continuous-a hot solid, liquid or gas under high pressure gives off a continuous gas
emission-line-a hot gas under low pressure produces a emission line spectrum absorption line-seen when a source of a continuous spectrum is viewed behind a cool gas under pressure |
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energy level
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the orbitals an atoms electrons move in
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continuous spectrum
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source which emits light in such a way that the intensity changes smoothly w/wavelengths and all colors present
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