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| The height of a wave from the origin to a crest, or from the origin to a trough. |
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| A set of frequencies of electromagnetic waves given off by atoms of an element; series of fine lines and individual colors. |
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| Electromagnetic Radiation |
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| A form of energy exhibiting wavelike behavior as it travels through space; can be described by wavelength, frequency, amplitude, and speed. |
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| Includes all forms of electromagnetic radiation; the types of radiation differ in their frequencies and wavelengths. |
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| The number of waves that pass a certain point per second. |
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| A phenomenon in which photoelectrons are emitted from a metal's surface when light of a certain frequency shines on the surface. |
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| A particle of of electromagnetic radiation with no mass that carries a quantum of energy. |
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| 6.626x10^-34 J(s), where J stands for joule. |
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| The minimum of energy that can be gained or lost by an atom. |
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| The shortest distance between equivalent points on a continuous wave; is usually expressed in meters, centimeters, or nano-meters. |
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| A three dimensional region around the nucleus of an atom that describes an electron's probable location. |
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| Predicts that all moving particles have a wave characteristics and relates each particle's wavelength to its frequency, mass, and Planck's constant. |
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| The energy levels contained within a principal energy level. |
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| The lowest allowable energy state of an atom. |
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| Heisenberg Uncertainty Principle |
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| States that it is not possible to know precisely both the velocity and position of a particle at the same time. |
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| The Major energy levels of an atom. |
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| Assigned by the quantum mechanical model to indicate the relative sizes and energies of atomic orbitals. |
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| Quantum Mechanical Model of the Atom |
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| An atomic model in which electrons are treated as waves; also called the wave mechanical model of the atom. |
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| Number assigned to each orbit of an electron. |
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| Pauli's Exclusion Principle |
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