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Unit 5 Chemistry

5.1-5.3 Vocab

TermDefinition
Louis de Broglie proposed that electrons should be considered as waves
orbit an allowed path around the nucleus with nothing between the paths
absorption energy is added to an atom in order to move an electron from a lower energy level to a higher energy level
Werner Heisenberg determined that it is impossible to know an electron's position and energy simultaneously
orbital a region in the atom where there is a high probability of finding electrons
Albert Einstein stated that while light has wavelike properties, it is also a stream of particles called photons (dual wave-particle nature)
Erwin Schrodinger developed equations that solved for the energy of the electron precisely, and its probable location
excited state a state in which an atom has absorbed a higher amount of energy than it has in its ground state
quantum theory describes mathematically the wave properties of electrons
Niels Bohr developed a model of the atom in which the electron can only circle the nucleus in allowed paths, called orbits
emission an electron falls to a lower energy level, and a photon is emitted
ground state the lowest energy state of an atom
Max Planck proposed that light emits energy in small packets called quanta
quantum mechanical model the current model of the atom
line-emission spectrum a diagram that indicates the energy emitted by a substance with respect to wavelength
wave-particle duality light exhibits many wavelike properties, and it can also be thought of as a stream of particles
quantum the minimum amount of energy that can be lost or gained by an atom
photon a particle of electromagnetic radiation that has zero mass and carries a quantum of energy
Planck's Constant the ratio of the energy of a photon to its frequency
electromagnetic spectrum all of the frequencies or wavelengths of electromagnetic radiation
photoelectric effect the emission of electrons from a metal when light shines on the metal
atomic emission spectrum lines of colored light obtained by passing the light emitted by an element through a prism
Created by: ecornwell
 

 



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