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Cards In This Set
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Theory that all matter was involved in a gigantic explosion about 15 billion years ago
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Big bang
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Number of wave crests, or peaks, in a wave passing by a given point per unit of time
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Frequency
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Negatively charged particle, approx. 1/1900 the mass of a neutron, that orbits an atomic nucleus
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Electron
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Positively charged particle found in the nucleus of an atom
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Proton
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Electrically neutral particle found in the nucleus of an atom
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Neutron
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Substance composed of just one type of atom. All share same # of protons/electrons, same atomic #
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Element
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Number of protons in an atom. simplest = hydrogen (1 proton, 1 electron)
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Atomic number
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Atoms of the same element that contain different numbers of neutrons and therefore have different atomic masses
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Isotope
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Mass on an element. approx - to the number of protons + neutrons in the nucleus of the atom
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Atomic mass number
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Combination of atoms - of either the same type or different types - bonded together
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Molecule
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Separation of electromagnetic radiation (including light) into its component frequencies
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Spectrum
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Unit of electromagnetic energy that appears as a burst of light when an electron jumps from an outer shell to an inner shell of an atom
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Photon
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Shift in frequency of light observed coming form a distant star. shift to lower frequency (red) b/c star is moving away from earth
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Red shift
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Process in which 2 nuclei combine to form a single, larger nucleus, and release a tremendous amount of energy
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Nuclear fusion
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Process in which a nucleus breaks apart in 2+ fragments. releases vast amounts of energy
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Nuclear fission
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