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20 Cards in this Set
- Front
- Back
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What was wrong with Rutherford's model of the atom?
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it did not explain how the atom's negatively charged electrons are distributed in the space surrounding its positively charged nucleus.
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electromagnetic radiation
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a form of energy that exhibits wavelike behavior as it travels through space
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give some example of electromagnetic radiation
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xrays, ultraviolet and infrared light, microwaves, and radio waves
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electromagnetic spectrum
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all the forms of electromagnetic radiation
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how does e.r. move?
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at a constant speed 3.00 x 10^8 meters per second (m/s)
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wavelength
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(upside down Y) the distance between corresponding points on adjacent waves
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frequency
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(V) defined as the number of waves that pass a given point in a specific time, usually one second. wave/second is called a hertz.
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relationship between freq and wl
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c=yv
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what is C?Y?v?
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c=speed of light, Y=wavelenth (m), v= frequency (s^-1)
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photoelectric effect
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emission of electrons from a metal when light shines in the metal
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Max Planck
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suggested that the object emits energy in small, specific packets called quanta
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relationship between a quantum of energy and the frequency of radiation
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E=hv
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what is E?V?h?
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e=energy in joules of a quantum of radiation
v = frequency in s^-1 h= planks constant 6.626 x10^-34 J.s |
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how did A>E> expand on planks theory
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that electromagnetic radiation has a dual wave-particle nature. the particles in the quantum of energy are called photons
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photon
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particle of electromagnetic radiation having zero mass and carrying a quantum of energy
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what is ae's equation
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E^photon = hv
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ground state
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lowest energy state of an atom
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excited state
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a state in which an atom has a higher potential energy than it has in its ground state
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line-emission spectrum
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the four bands of light
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continuous spectrum
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the emission of a continuous range of frequencies of electromagnetic radiation
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