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the distance (measured in the direction of propagation) between two points in the same phase in consecutive cycles of a wave
the emission of electrons from a material when light of certain frequencies shines on the surface of the material
A fundamental constant, h, that relates the energy of light quanta to their frequency: h = 6.6 X 10^-34 joule·second
model of the atom in which electrons move rapidly around the nucleus in paths called orbits
condition of an atom whose electrons are at higher energy levels than the ones they normally occupy
Line emission spectrum
a series of specific wavelengths of emitted light created when the visible portion of light from excited atoms is shined through a prism
Quantum Model of the Atom
an atomic model in which electrons are treated as waves; also called the wave mechanical model of the atom
Heisenberg's Uncertainty Principle
it is impossible to know exactly both the velocity and the position of a particle at the same time
Schrodinger's wave equation
predicts where each electron in an atom will probably be found, i.e. orbitals
A three-dimensional region around the nucleus of an atom that describes an electron's probable location
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