chem. chapter 4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| 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
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| sublevel | division of a principle energy level in an atom
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| quantum-mechanical model | model that explains the properties of atoms by treating the electron as a wave and by quantizing its energy
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| quantum number | number assigned to each orbit of an electron in an atom
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| orbital diagram | representation of an atom in which arrows in boxes are used to show the electron configuration of an atom
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| electron density | concentration of electrons in an electron cloud of an atom
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| ground state | lowest energy level of electrons in an atom
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| wavelength | distance between two successively similar points on a wave
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| 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
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| excited state | energy level attained by an electron that absorbs additional energy and jumps from its normal level to a higher energy level
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| orbital | term used to describe the probability of finding electrons in certain regions of an atom
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| electromagnetic radiation | form of energy consisting of waves made up of oscillating electric and magnetic fields at right angles to each other
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| speed of light | speed at which light waves travel; equal to 3.00 x 10 the 8th power meters per second in a vacuum
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| frequency | number of waves that pass a certain point in a given amount of time
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| visible spectrum | portion of the electromagnetic spectrum that can be seen with the un-aided eye
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| planks constant | constant value used to relate the frequency of an electromagnetic wave to its energy
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| quantum | discrete bit of energy; smallest unit of energy that can be absorbed or emitted
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| amplitude | height of a wave measured from its origin to its crest
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| line spectrum | spectrum that contains only certain wave-lengths
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| electron configuration | distribution of electrons among the orbitals of an atom
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| photon | quantum of electromagnetic energy
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| matter wave | term used to describe the wavelike behavior of particles
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| principle energy levels | one of a limited number of energy levels in an atom
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To hide a column, click on the column name.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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