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