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chem. chapter 4

uncertainty principle principle that states that either the position or the momentum of a moving particle can be measured and known exactly, but that both measurements cannot be known at the same time
sublevel division of a principle energy level in an atom
quantum-mechanical model model that explains the properties of atoms by treating the electron as a wave and by quantizing its energy
quantum number number assigned to each orbit of an electron in an atom
orbital diagram representation of an atom in which arrows in boxes are used to show the electron configuration of an atom
electron density concentration of electrons in an electron cloud of an atom
ground state lowest energy level of electrons in an atom
wavelength distance between two successively similar points on a wave
photoelectric effect phenomenon in which light can be used to knock electrons out of metal; can be explained only in terms of the particle nature of radiant energy
excited state energy level attained by an electron that absorbs additional energy and jumps from its normal level to a higher energy level
orbital term used to describe the probability of finding electrons in certain regions of an atom
electromagnetic radiation form of energy consisting of waves made up of oscillating electric and magnetic fields at right angles to each other
speed of light speed at which light waves travel; equal to 3.00 x 10 the 8th power meters per second in a vacuum
frequency number of waves that pass a certain point in a given amount of time
visible spectrum portion of the electromagnetic spectrum that can be seen with the un-aided eye
planks constant constant value used to relate the frequency of an electromagnetic wave to its energy
quantum discrete bit of energy; smallest unit of energy that can be absorbed or emitted
amplitude height of a wave measured from its origin to its crest
line spectrum spectrum that contains only certain wave-lengths
electron configuration distribution of electrons among the orbitals of an atom
photon quantum of electromagnetic energy
matter wave term used to describe the wavelike behavior of particles
principle energy levels one of a limited number of energy levels in an atom
Created by: hannahorth98



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