7.1-2

Question 1

periodic back-and-forth motion that transmits energy

Answer 1

wave

Question 2

high points of a wave

Answer 2

crests

Question 3

low points of a wave

Answer 3

troughs

Question 4

distance between two corresponding points on successive waves

Answer 4

wavelength (λ)

Question 5

measure of a wave’s strength

Answer 5

amplitude

Question 6

_______ is half the vertical distance between a crest and trough

Answer 6

amplitude

Question 7

number of complete waves that pass by a point in a given time

Answer 7

frequency (f)

Question 8

SI unit of frequency

Answer 8

Hertz (Hz)

Question 9

_____ is equal to one wave (or cycle) per second

Answer 9

Hertz

Question 10

rate at which a wave travels

Answer 10

speed (v)

Question 11

idea that light can be pictured as streams of tiny particles emitted by light sources

Answer 11

particle theory of light

Question 12

developed the particle theory of light

Answer 12

Sir Isaac Newton

Question 13

theory stating that light consists of a series of waves rather than individual particles

Answer 13

wave theory of light

Question 14

developed the wave theory of light

Answer 14

Christiaan Huygens

Question 15

wave consisting of an electric field and a magnetic field vibrating at right angles to each other

Answer 15

electromagnetic wave

Question 16

developed the electromagnetic wave

Answer 16

James Clerk Maxwell

Question 17

true or false: the measured speed of light in a vacuum never varies

Answer 17

true

Question 18

speed of light is what value?

Answer 18

c = 3.00 x 10^8 m/s

Question 19

arrangement of all forms of electromagnetic radiation in order of frequency and wavelength

Answer 19

electromagnetic spectrum

Question 20

nature of light as exhibiting properties of both waves and particles

Answer 20

wave-particle duality

Question 21

two different people who developed the wave-particle duality

Answer 21

Max Planck and Albert Einstein

Question 22

theory stating that light consists of electromagnetic waves traveling as tiny bundles or “packets” of energy called photons

Answer 22

quantum theory of light

Question 23

“packets” of energy that light travels as

Answer 23

photons

Question 24

electromagnetic waves traveling as photons

Answer 24

light

Question 25

true or false: light must consist of whole numbers of photons

Answer 25

true

Question 26

value of Planck's constant

Answer 26

h = 6.626 x 10^-34 J x s

Question 27

single frequency

Answer 27

monochromatic

Question 28

dense, central core of an atom

Answer 28

nucleus

Question 29

instruments used in the laboratory to separate the colors of light and measure their frequencies

Answer 29

spectroscope and spectrograph

Question 30

spectrum containing only certain colors (wavelengths) of light

Answer 30

line spectrum

Question 31

spectrum containing the complete array of colors

Answer 31

continuous spectrum

Question 32

two people responsible for line spectra

Answer 32

Robert Bunsen and Gustav Kirchhoff

Question 33

created the plum pudding model

Answer 33

JJ Thomson

Question 34

created the planetary model

Answer 34

Ernest Rutherford

Question 35

presents the atom as a miniature solar system with electrons orbiting like planets

Answer 35

planetary model

Question 36

true or false: the electron in the hydrogen atom can move about the nucleus only in specific orbits

Answer 36

true

Question 37

specific orbits in an atom in which electrons move

Answer 37

energy levels

Question 38

________ means restricted to certain values

Answer 38

quantized

Question 39

created the Bohr model of the atom

Answer 39

Niels Bohr

Question 40

lowest energy state of an atom

Answer 40

ground state

Question 41

any states with higher energy than the ground state

Answer 41

excited states

Question 42

the ______ energy state possible is the most stable

Answer 42

lowest

Question 43

both _________ and ________ are quantized

Answer 43

absorption and emissions

Question 44

waves exhibited by any particle in motion; cannot move at the speed of light

Answer 44

matter wave

Question 45

developed matter waves concept

Answer 45

Louis de Broglie

Question 46

true or false: electrons have wave-particle duality

Answer 46

true

Question 47

used to obtain sharp images of very small objects

Answer 47

electron microscopes

Question 48

model of an atom that proposes that an electron in an atom behaves as a three-dimensional matter wave

Answer 48

wave-mechanical model

Question 49

developed the wave-mechanical model

Answer 49

Schrodinger

Question 50

wave that oscillates in place, without overall wave movement or transfer of energy

Answer 50

standing wave

Question 51

principle stating that it is impossible to simultaneously determine the momentum and the position of an electron with certainty

Answer 51

uncertainty principle

Question 52

regions of space through which an electron moves with probabilities determined using the Schrodinger equation

Answer 52

orbitals

Question 53

model of an atom in which values from the Schrodinger equation are interpreted as the probabilities of finding an electron at a certain point in space

Answer 53

electron-cloud model

Question 54

developed the electron-cloud model

Answer 54

Max Born

Question 55

_________ is simply another way of looking at the results of the Schrodinger equation

Answer 55

Born's interpretation