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![]() Physical Science: Essential Terms 3Mastery: 0%
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proton
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positively charged subatomic particle
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neutron
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subatomic particle with no charge
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mass
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the quantity of matter in a sample
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atomic number
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the number of protons in an atom's nucleus
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mass number
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the total number of protons and neutrons in an atom's nucleus
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isotope
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one of two or more forms of an element that has the same # of protons but different # of neutrons
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ion
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an atom or molecule that is charged due to loss or gain or electrons
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energy
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the ability to do work
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nuclear reactions
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changes in an atomic nucleus resulting from bombardment by an energetic particle
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radiation
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energy that travels as waves or particles
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carbon dating
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method of finding the age of a once-living object by calculating the proportion of carbon isotopes
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sound
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a pattern of disturbance through a medium that can be detected by a hearing structure
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waves
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a disturbance that transfers energy from point to point
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crest
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the maximum upward displacement of a medium caused by a wave
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trough
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the maximum downward displacement of a medium caused by a wave
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amplitude
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the height from normal of a wave; corresponds to intensity
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