Chapter 7 Key Terms

Question 1

Amplitude

Answer 1

Vertical height of a crest of a wave, measure of intensity

Question 2

Angular Momentum Quantum Number (l)

Answer 2

Integer indicating the shape of an orbital (0=s,1=p,2=d…)

Question 3

Complementary Properties

Answer 3

the more that you know about one, the less you know about the other

Question 4

Constructive Interference

Answer 4

Interaction of waves that align, creating a greater amplitude

Question 5

de Broglie Relation

Answer 5

(Lambda=h/mv)

Question 6

Destructive interference

Answer 6

The interaction of waves aligned so that the waves cancel

Question 7

Deterministic

Answer 7

present circumstances determine future events

Question 8

Diffraction

Answer 8

When a wave passing through an aperture spreads out to form a new wave front

Question 9

Electromagnetic Radiation

Answer 9

A form of energy embodied in oscillating electric and magnetic fields

Question 10

Electromagnetic Spectrum

Answer 10

The range of the wavelengths of all possible EM radiation

Question 11

Emission Spectrum

Answer 11

The range of wavelengths emitted by a particular element

Question 12

Frequency (v)

Answer 12

The number of cycles that pass through a stationary point in one second

Question 13

Gamma rays

Answer 13

Form of EM radiation with the highest energy and frequency

Question 14

Heisenberg’s Uncertainty Primciple

Answer 14

It is impossible to know both the velocity and position of an electron

Question 15

Indeterminacy

Answer 15

The present doesn’t inherently determine the exact events of the future

Question 16

Infrared radiation

Answer 16

EM radiation emitted from warm object, wavelengths larger than visible light

Question 17

Interference

Answer 17

Superposition of two or more waves, resulting in a change of amplitude

Question 18

Magnetic quantum number (ml)

Answer 18

Integer that indicates the orientation of an orbital

Question 19

Microwaves

Answer 19

EM radiation with longer wavelengths than IR radiation, used for radar

Question 20

Node

Answer 20

A point where the wave function, probability density, and radial distribution go through 0

Question 21

Orbital

Answer 21

A probability distribution map based on the quantum mechanical model of the atom, used to describe the likely position of an electron in an atom

Question 22

Phase

Answer 22

with regard to waves and orbitals, the phase is the sign of the amplitude of the wave (+/-)

Question 23

Photoelectric effect

Answer 23

The observation that many metals emit electrons when light falls upon them

Question 24

Photon

Answer 24

The smallest packet of electromagnetic radiation

Question 25

Quanta

Answer 25

The smallest packet of electromagnetic radiation

Question 26

Principle level (shell)

Answer 26

The group of orbitals with the same value of N

Question 27

Principle quantum level (n)

Answer 27

An integer that specifies the size and energy of an orbital. the higher it is, the greater the average distance between electron and the nucleus,

Question 28

Probability density

Answer 28

Probability of finding an electron at a point in space

Question 29

Quantum number

Answer 29

Four numbers that determine the shape and energy of orbitals/electrons in orbitals

Question 30

Quantum mechanical model

Answer 30

Model that explains the behavior of absolutely small particles such as an electron or photons

Question 31

Radio waves

Answer 31

EM radiation with the longest wavelengths and smallest energy

Question 32

Spin quantum number (ms)

Answer 32

The fourth quantum number, indicates electron's spin as up (1/2) or down (-1/2)

Question 33

Sublevel (subshell)

Answer 33

Orbitals with the same n and l

Question 34

UV Radiation

Answer 34

EM radiation with slightly smaller wavelengths than visible light

Question 35

Visible light

Answer 35

EM radiation that can be seen by humans

Question 36

Wave function (psi)

Answer 36

A function describing the wave nature of electrons

Question 37

Wavelength (lambda)

Answer 37

Distance between crests of a wave

Question 38

X rays

Answer 38

EM radiation with wavelength slightly longer than gamma rays