Electrons in Atoms

Electromagnetic Radiation
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.
Wavelength
The shortest distance between equivalent points on a continuous wave; is usually expressed in meters, centimeters, or nanometers.
Frequency
The number of waves that pass a given point per second.
Amplitude
The height of a wave from the origin to a crest or from the origin to a trough.
Electromagnetic Spectrum
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.
Quantum
The minimum amount of energy that can be gained or lost by an atom.
Planck’s Constant
Has a value of 6.626 X 10-34 Jxs, where J is the symbol for the joule.
Photoelectric Effect
A phenomenon in which photoelectrons are emitted from a metal’s surface when light of a certain frequency shines on the surface.
Photon
A particle of electromagnetic radiation with no mass that carries a quantum of energy.
Atomic Emission Spectrum
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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