EXAM 1

Question 1

Physical laws used to describe the energy and motion of very small objects, like subatomic particles

Answer 1

Quantum mechanics

Question 2

Set of laws used to describe energy and motion of larger objects

Answer 2

Classical mechanics

Question 3

Studies the motions of objects

Answer 3

Mechanics

Question 4

Quantum mechanical model of the atom theory

Answer 4

1. Energy is absorbed, released, and stored for atoms and molecules

Question 5

A vibrating disturbance by which energy is transmitted through space

Answer 5

Wave

Question 6

Number of times per second of the wave

Answer 6

Frequencies

Question 7

Average of its displacement (A)
The vertical distance from the midline of a wave to the peak or trough
Proportional to the intensity

Answer 7

Amplitude

Question 8

Speed at which the wavelength water moves forward

Answer 8

Velocity

Question 9

Distances between the crests of the wave

Answer 9

Wavelength

Question 10

How to find speed (velocity)

Answer 10

V= wavelength x frequency

Question 11

Comprises only a very small fraction of all wavelengths of light

Answer 11

Electromagnetic Spectrum

Question 12

Wavelength of light

Answer 12

Electromagnetic spectrum

Question 13

Electromagnetic spectrum keys

Answer 13

Left to right: shorter the wavelength higher the frequency greater the energy

Right side has shorter waves, high energy
Left smaller waves, low energy

Question 14

How to find frequency

Answer 14

Frequency= speed of light (3.0x10^8) / wavelength

Question 15

How to find wavelength

Answer 15

Wavelength= speed of light/ frequency

Question 16

Interaction between waves

Answer 16

Interference

Question 17

Two waves interact so that they add to make a larger wave

Answer 17

Constructive interference

Question 18

The peak of one wave and the peak of another superimpose to re-Inforce eachother

Answer 18

Phase

Question 19

The waves meet and cancel eachother out, you have a flat line

Answer 19

Destructive

Question 20

Peak of one wave and through of the other superimpose perfectly to cancel eachother out

Answer 20

Out of phase

Question 21

The property of heated molecules to release EM radiation
Electricity when both make the burner molecules will vibrate fast
It is not particular a wavelength but it is over a spectrum of different temps of all waves
Cannot use classical mechanics
If you assume that light behaves like a photo then the prediction fits the data

Answer 21

Black body radiation

Question 22

Plancks Idea

Answer 22

Explained black body radiation, assumed light is full of photons

Question 23

A massless particle that acts like light, colors have same photons (for light beams)

Answer 23

Photon

Question 24

Atoms and molecules can only emit and absorb in small amounts

Answer 24

Quanta

Question 25

How to find energy of a photon

Answer 25

Hvphoton Frequency = c/wavelength Photon= h(c/wavelentght)

Question 26

- Where light strikes the surge ace of a metal and expels an electron into space but only if the light has required energy - Total energy of the light= energy needed to release the electron off the metal + kinetic energy of the ejected electron - classical mechanics predicted that, given the light was bright, all colors frequencies of light should cause ejection of a proton but it was a fail

Answer 26

Photoelectric effect

Question 27

Photo electric effect equation

Answer 27

TElight= BEelectron + KEelectgron TElight= BE electron hv= BEelectron Vlight= BEelectron/h OR KEe= H(c/wavelength light) -BEe

Question 28

Contains all wavelengths of visible light, it is smear from red to violet like seen in a rainbow, this is seen in black body radiation when you heat a solid to a very high temp and molecules vibrate (white line)

Answer 28

Continuous spectra

Question 29

When purified elements are energized and as a result have light emission only at a specific wavelength, this is caused by electrons jumping between energy levels, heating or using electric are, energized a sample until it prodiuces light, light is passed through a primsm Colored lines

Answer 29

Line spectra

Question 30

To explain why elements emit only discrete wavelengths of light - energy of an electron was quantized and that the amount of energy of an electron was quantized and that the amount of energy in the electron was related to the electrons distance from the nucleus - electrons do not travel in orbits

Answer 30

Bohr model

Question 31

Bright line spectra

Answer 31

Emission

Question 32

Dark line spectra

Answer 32

Absorption

Question 33

Traveling waves encounter an obstacle or opening in a barrier that is about the same size as the wavelength, they bend - waves pass through, bend and go off in different directions

Answer 33

Diffraction

Question 34

Is the de brogile wave a electromagnetic radiation

Answer 34

No

Question 35

De brogile equation

Answer 35

Wavelength = h/ mv

Question 36

1. A single electron can occupy different places at the same time 2. A single electron can have two or more different velocities at the same time

Answer 36

Heinsenburg theory

Question 37

The idea tha an electron can be at 2 or more places at the same time, predicts all successful standing waves that can form sphere sizes , define region in the space and electron density

Answer 37

Schrodinger

Question 38

The range of velocities that electrons can occupy is inversely related to the range of positions it can occupy

Answer 38

Heisenburg uncertainty principle

Question 39

Size of atoms, range of positions equation

Answer 39

(Deltax)(mdeltav) > h/ 4pi

Question 40

Electrons have a wave nature Uncertainty principle Energies of electrons are quantized

Answer 40

Wave mechanical model

Question 41

Locations and energies of these orbitals are determined by math functions

Answer 41

Wave functions

Question 42

Locations were the electrons reside in the atom and are regions of space which have a high probability of finding electrons

Answer 42

Orbitals

Question 43

Four quantum numbers

Answer 43

The principle Angular momentum Magnetic Spin

Question 44

Distance from the nucleus and the energy of the electron The farther out, the higher the energy and more unstable Main energy level and shell 1,2,3,4

Answer 44

Principle quantum

Question 45

Shape of orbital, sub level of energy/sub shell L 0,1,2 (n-1) S=0 P=1 D=2 F=3 G=4

Answer 45

Angular momentum

Question 46

Magnetic quantum ml Ml= -1, 0,1….+1

Answer 46

Magnetic quantum