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Physics Unit 9

QuestionAnswer
Most properties of light could be explained by the ________ theory of light. wave
Light ________ is explained by the particle theory of light. emission
As energy is added to an atom, its electrons shift to a(n) __________ energy level. higher
As the energy level shifts back to a normal state, a(n) ___________ is released. photon
Different amounts of energy produce light of different ____________. frequencies
The nucleus of an atom contains __________ and neutrons. protons
An atom in its normal state has the same number of protons as _________. electrons
Charges undergoing ____________ produce electromagnetic radiation. acceleration
According to classical physics, _____________ are in a constant state of acceleration. electrons
An electron's energy never _____________ in its orbit. diminishes
Each element has its own characteristic _____________ of light. emission spectrum
A spectroscope produces a clear picture of an element's ____________. emission spectrum
As an element is heated, it incandesces, which means it emits _____________. light
When a gas is put in a container and illuminated with incandescent light, the gas __________ certain wavelengths of the light. absorbs
An element's absorption spectrum is ______________ its emissions spectrum. the same as
___________ believed that light consisted of a stream of particles, even though his experiments with lenses, mirrors, and glass plates suggested to him that light traveled in waves. Isaac Newton
___________ double slit experiment showed that light consisted of waves. Thomas Young's
___________ study of blackbody radiation led to the development of a constant that bears his name. Max Planck's
_________ theoretical work led to experimentation that proved that light consists of particles. Albert Einstein's
As the temperature of a blackbody rises, the frequency of the radiation emitted will _______. rise
The failure of a blackbody to emit high levels of radiation in the ultraviolet range is called the ______________. ultraviolet catastrophe
The photoelectric effect is the phenomenon of _____________ being emitted when light strikes a metal surface. electrons
The maximum rate of release of particles by the photoelectric effect is related to the _____________ of light. frequency
The only way the photoelectric effect can be satisfactorily explained is by the ___________ theory of light. particle
Light arrives at its destination as ____________. photons
Niels Bohr called the dual nature of light ______________. complementarity
The energy of a photon is found by dividing the frequency of the light wave by ____________. Planck's constant
The planetary model of the atom has ___________ orbiting the nucleus of the atom. electrons
The "raisin-pudding" model of the atom stated that electrons were in orbits at a _____________ from the nucleus defined by the energy state of the electron. distance
The quantum and planetary models both failed to explain why electrons did not give off __________________ during their orbits. electromagnetic radiation
Light consists of electromagnetic waves. T/F True
Light consists of streams of particles. T/F True
The scientist who suggested that particles of matter in motion should have wave properties was ________________. de Broglie
The physicist who suggested that a wave function could determine the probability of an electron occupying any particular energy shell was _____________. Schrodinger
The scientist who stated that it was impossible to be certain about the precise momentum and position of an electron at any one instant was ____________. Heisenberg
Each energy shell is made up of one or more __________ traveling with a particular frequency. electrons
An electron's oscillations are performed at _________ wavelengths at all times. exact
The electron ___________ find an energy level where its oscillations form a standing wave. must
The quantum numbers, taken together, give an ___________ picture of the configuration of each electron in the atom. accurate
The scientist who gave a quantum description and formula to describe the curve of radiation in blackbodies was _____________. Planck
The scientist who discovered the electron was ________________. Thomson
The scientist responsible for introducing the second and third quantum numbers was _____________. Sommerfeld
Wave motion is the reason that electrons inhabit specific energy shells. T/F True
Each energy shell of a proton is a standing wave of vibrations of the proton. T/F False
Samuel Goudsmit and George Uhlenbeck were among the first scientists to accept the "matter wave" theory. T/F False
The probabilities of an electron's position are best visualized with an electron cloud diagram. T/F True
The uncertainty in position and momentum of an electron is a principle developed by Einstein. T/F False
The complementarity principle was developed by Niels Bohr. T/F True
The first or principal quantum number has to do with the ______________. energy shell level in which the electron is located at any one time
The second or angular momentum quantum number has to do with the _________________. shape an orbital will have
The third or magnetic quantum number has to do with the ____________. orbital's orientation around the nucleus
The fourth or spin quantum number has to do with the _______________. intensity of spectral lines
Light emission is explained by the ___________ theory of light. particle
As _____________ is added to an atom, the electrons shift to a higher energy level. energy
The ____________ of an atom consists of protons and neutrons. nucleus
Thomas Young's double slit experiment showed that light consisted of ______________. waves
The ultraviolet catastrophe is the failure of a(n) ___________ to emit high levels of radiation in the ultraviolet range. blackbody
Thomson discovered the __________. electron
Each energy shell of an electron is a(n) _____________ of vibrations of the electron. standing wave
Each energy shell is made up of one or more ____________ traveling with a particular frequency. electrons
An electron cloud diagram shows the ____________ of an electron's position. probabilities
The scientist who suggested that particles of matter in motion should have wave properties was ______________. de Broglie
The scientist who suggested that a wave function could determine the probability of an electron occupying any particular energy shell was ____________. Schrodinger
The scientist who stated that it was impossible to be certain about the precise momentum and position of a particle at any one instant was _____________. Heisenberg
The electron must find an energy level where its oscillations form a(n) ____________. standing wave
The scientist who gave a quantum description and formula to describe the curve of the radiation in blackbodies was ____________. Planck
The scientist who discovered the second and third quantum numbers was _______________. Sommerfeld
The "raisin-pudding" model of the atom has electrons floating around in a(n) ___________ charged "sea". positively
An atom in its normal state has the same number of protons as ____________. electrons
According to classical physics, _________ are in a constant state of acceleration. electrons
Different amounts of energy added to an atom produce ____________ of different frequencies. light
The planetary model of the atom has ____________ orbiting the nucleus of the atom. electrons
The energy of a photon is found by dividing the frequency of the light wave by _______________. Planck's constant
The principle that it is impossible to be sure of both the position and momentum of an electron at any one instant is called the ___________. uncertainty principle
The quantum number associated with the energy shell level in which the electron is located at any one time is the ______________ quantum number. first
As _____________ is/are added to an atom, its electrons shift to a higher energy level. energy
As the energy level of an atom shifts from an excited state back to a normal state, a(n) _____________ is released. photon
Different amounts of energy produce light of different ____________. frequencies
The photoelectric effect is the phenomenon of _______________ being emitted when light strikes a metal surface. electrons
____________ called the dual nature of light complementarity. Bohr
The uncertainty principle is most closely associated with _____________. Heisenberg
To get a clear picture of the characteristic light emissions from an element, use a _____________. spectroscope
An element's absorption spectrum is ________________ its emission spectrum. the same as
As an element is heated, it incandesces, which means it emits _____________. light
Light consists of ________________ waves. electromagnetic
Light consists of streams of _____________. photons
Created by: jhincks