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Electrons in Atoms
atomic structure
10
Chemistry
10th Grade
09/22/2009

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Term
Electromagnetic Radiation
Definition
A form of energy exhibiting wavelike behavior as it travels through space; can be described by wavelength, frequency, amplitude, and speed and includes visible light, microwaves, X rays, and radio waves.
Term
Wavelength
Definition
The shortest distance between equivalent points on a continuous wave; is usually expressed in meters, centimeters, or nanometers.
Term
Frequency
Definition
The number of waves that pass a given point per second.
Term
Amplitude
Definition
The height of a wave from the origin to a crest or from the origin to a trough.
Term
Electromagnetic Spectrum
Definition
Includes all form of energy exhibiting wavelike behavior as it travels through space; can be described by wavelength, frequency, amplitude, and speed and includes visible light, microwaves, X rays, and radio waves.
Term
Quantum
Definition
The minimum amount of energy that can be gained or lost by an atom.
Term
Planck's Constant
Definition
Has a value of 6.626 X 10-34 Jxs, where J is the symbol for the joule.
Term
Photoelectric Effect
Definition
A phenomenon in which photoelectrons are emitted from a metal's surface when light of a certain frequency shines on the surface.
Term
Photon
Definition
A particle of electromagnetic radiation with no mass that carries a quantum of energy.
Term
Atomic Emission Spectrum
Definition
A set of frequencies of electromagnetic waves given off by atoms of an element; consists of a series of fine lines of individual colors.
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