Physics Unit 9 Test
spectroscope
A special device can produce a crisp picture of an element's emission spectrum by separating the light into clearly defined __________.
emission
A spectroscope can display a(n) ____________ spectrum from a glowing element.
electron
According to classical physics a(n) ___________ is in a constant state of acceleration.
electrons
An atom in its normal state has the same number of protons as ________.
light
An element is heated, it incandesces, which means it emits __________.
next higher
As energy is added to the atom, the electrons momentarily shift to the _________________ energy level
photon
As the energy level of an atom shifts back from an excited state to a normal state, a(n) _______ is released.
increase
As the temperature of a blackbody rises, the frequency of the energy emitted will ___________.
frequencies
Different amounts of energy produce light of different ______________.
yes, the nature of light has a wave-particle duality
Does light consist of electromagnetic waves or streams of particles?
electrons
Each energy shell is made up of one or more ___________ traveling with a particular frequency.
standing wave
Each energy shell of an electron is a(n) ________ of vibrations of the electron.
Thomas Young
His double slit experiment seemed to settle the question about the nature of light—light definitely consisted of waves.
photons
Light consists of ____ that travel as waves.
particle
Light emission is explained by the __________ theory of light.
complementarity
Niels Bohr, one of the most important scientists in the history of atomic research, called this relationship between these two aspects _____________.
ultraviolet catastrophe
Scientist call the failure of a blackbody to emit high levels of radiation in the ultraviolet light range the _____.
negatively
The "raising pudding" model of the atom had a positively charged "sea" of pudding with _______ charged electrons floating around it, like raisins.
absorption, emission
The _______ frequencies of an element are exactly the same as the ________ frequencies of that element.
standing wave
The electron must find an energy level where its oscillations form a(n) ________.
Thomson
The electron was discovered by _______ in 1897.
Planck's constant
The energy of a photon is found by multiplying the frequency of the light wave by _____________.
direction of spin
The fourth quantum number has to do with _____.
protons
The nucleus of an atom contains certain number of _______ and a certain number of neutrons
particle
The only way the the photoelectric effect can be satisfactorily explained is by the __________ theory of light.
photoelectric effect
The phenomenon of electrons being emitted when light strikes a metal surface is called the _____.
electrons
The planetary model of an atom has _______ orbiting the nucleus.
uncertainty principle
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 ________.
cloud
The probabilities on an electron's position are best visualized with an electron ________ diagram.
principal or first
The quantum number associated with the energy shell level in which the electron is located at any one time is the _______ quantum number.
Planck
The scientist who gave a quantum description and formula to describe the curve of radiation in blackbodies was _____.
Sommerfeld
The scientist who responsible for introducing the second and third quantum numbers was _____.
shape of the orbital
The second quantum number has to do with _____.
orbital's orientation
The third quantum number has to do with _____.
Werner Heisenberg
The uncertainty principle is mostly related to _____.
Erwin Schrödinger
Which scientist suggested that a wave equation could determine the probability of an electron occupying any particular shell?
Louis de Broglie
Which scientist suggested that particles of matter in motion should have wave properties?
Werner Heisenberg
Which scientist's uncertainty principle stated that it was impossible to be certain about the precise position and momentum of an electron at any one instant?
Rutherford
___________ proposed the planetary model of the atom.