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