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25 Cards in this Set
- Front
- Back
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Electron(e-)
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a negatively charged subatomic particle having a tiny mass
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Proton(p+)
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a positively charged subatomic particle having an approximate 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 an atom containing protons and neutrons
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Atomic Number
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a value indicating the number of protons in the nucleus of an atom
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Mass Number (A)
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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 nucleus
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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 1/12 the mass of a C-12 atom
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Atomic Mass
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the average mass of all 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 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 to red, that is, approximately 400-700 nm
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Radian Energy Spectrum
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a range of light energy extending from gamma rays to 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 describes 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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Electron Configuration
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a shorthand description of the arrangement of electrons by sublevels according to increasing energy
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Energy Sublevel
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an electron energy level that results from splitting a main energy level
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Uncertainty Principle
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the statement that it is impossible to precisely measure the location and energy of a particle at the same time
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Quantum Mechanical Atom
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a sophisticated model of the atom that describes the energy of an electron in terms of its probability of being found in a particular location about the nucleus
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Orbital
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a region about the nucleus in which there is a high probability of finding an electron with a given energy
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