Ch 7 Vocab

Question 1

Radiation that consists of wave-like electric and magnetic fields
Including light, microwaves, radio signals, and x-rays

Answer 1

Electromagnetic Radiation

Question 2

Lambda

The distance between successive maximums or minimums in a wave

Answer 2

Wavelength

Question 3

The number of complete waves passing a point in a given amount of time

Answer 3

Frequency

Question 4

The unit of frequency, or cycles per second

Answer 4

Hertz

Question 5

The maximum height of a wave, as measured from the axis of propagation

Answer 5

Amplitude

Question 6

A point of zero amplitude of a wave

Answer 6

Node

Question 7

A single-frequency wave having fixed points of zero amplitude

Answer 7

Standing Wave

Question 8

The proportionality constant that relates the frequency of radiation to its energy

Answer 8

Plancks Constant

Question 9

The ejection of electrons from a metal bombarded with light of at least a minimum frequency

Answer 9

Photoelectric Effect

Question 10

A “particle” of electromagnetic radiation having zero mass and an energy given by Plancks law

Answer 10

Photon

Question 11

The spectrum of light emitted by excited atoms in the gas phase, consisting of discrete wavelengths

Answer 11

Line Emission Spectrum

Question 12

The state of an atom in which all electrons are in the lowest possible energy levels

Answer 12

Ground State

Question 13

The state of an atom in which at least one electron is not in the lowest possible energy level

Answer 13

Excited State

Question 14

A general theoretical approach to atomic behavior that describes the electron in an atom as a matter wave

Answer 14

Quantum Mechanics

Question 15

The idea that the electron has properties of both a wave and a particle

Answer 15

Wave-Particle Duality

Question 16

A set of equations that characterize the electron as a matter wave

Answer 16

Wave Function(s)

Question 17

The probability of finding an atomic electron within a given region of space, related to the square of the electrons wave function

Answer 17

Electron Density

Question 18

The matter wave for an allowed energy state of an electron in an atom or molecule

Answer 18

Orbital(s)

Question 19

A set of numbers with integer values that define properties of an atomic orbital

Answer 19

Quantum Number(s)

Question 20

A surface on which there is zero probability of finding an electron

Answer 20

Nodal Surface