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Stack #529122

Ch 4.1 The Development of a New Atomic Model

Electromagnetic Radiation the radiation associated with an electric and magnetic field; it varies periodically and travels at the speed of light.
Electromagnetic Spectrum all the frequencies or wavelenghts of electromagnetic radiation.
Wavelength the distance from any point on a wave to an identical point on the next wave.
Frequency the number of cycles or vibrations per unit of time; also the number of waves produced in a given amount of time.
Photoelectric Effect the emission of electrons from a material when light of certain frequencies shines on the surface of the material.
Quantum the basic unit of electromagnetic energy; it characterizes the wave properties of electrons.
Photon a unit or quantum of light; a particle of electromagnetic radiation that has zero rest mass and carries a quantum of energy
Ground state the lowest energy state of a quantized system.
Excited State a state in which an atom has more energy than it does at its ground state.
Line-emission spectrum a diagram or graph that indicates the degree to which a substance emits radiant energy with respect to wavelength.
Continuous spectrum the uninterrupted broad band of all colors (wavelengths)emitted by incandescent solids.
Created by: nsantana



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