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25 Cards in this Set
- Front
- Back
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electron
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a negatively charged subatomic particle having a neglible mass
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proton
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a positively charged subatomic particle having an approimxmate mass of 1 amu
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neutron
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a neutral subatomic particle having an approximate mass of 1 amu
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atomic nucleus
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a region in the center of atom containing protons and neutrons
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atomic number
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a value indicting the number of protons in the nucleus of an atom
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mass number
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a value indicating the number of protons and neutrons in the nucleus of an atom
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atomic notation
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a symbolic method for expressing the composition of an atomic mass
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isotopes
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atoms of the same element that have a different number of neutrons
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atomic mass unit (amu)
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a unit of mass exactly equal to 1 1/2 the mass of a c-12 atom
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atomic mass
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the average mass of all the naturally occurring isotopes of an element
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wavelength
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the distance a light wave travels to complete one cycle
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frequency
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the number of times a light wave completes a cycle in one second
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light
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a general term that can refer to either visible or invisible radiant energy
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visible spectrum
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a range of light energy extending from violet through red, approximitly 400-700 nm
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radiant energy spectrum
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a rannge of light energy extending from gamma rays through microwaves
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continuous spectrum
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a band of light energy that is uninterrupted
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photon
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a particle of radiant energy
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Bohr atom
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a model of the atom that descreibes electrons circling the nucleus in orbits
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energy level
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an orbit of specific energy that electrons occupy as they circle the nucleus
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emission line spectrum
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a collection of narrow bands of light produced by atoms of a given element releasing energy
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energy sublevel
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an electron energy level resulting from splitting a main energy level
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electron configuration
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a shorthand descroption of the arrangement of electrons by sublevels according to increasing energy
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uncertainty principal
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the statement that it is impossible to precisly meausre the location and energy of a particle at the same time
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quamtum mechanical atom
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a sophisticated model of the atom that describes the energy of an electron in terms of its probablity of being found in a paticular location about the nucleus
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orbital
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a reigion about the nucleus in which there is a high probability of finding an electron with a given energy
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