1. calculate and record your chapter # 3 test % grade. 2. did you meet your goal? why or why not. 3....
TRANSCRIPT
1. Calculate and record your Chapter # 3 Test % grade.
2. Did you meet your goal? Why or why not.
3. Study (preparation) Plan for next test?
Day 2 12-9
1. Average your first three test grades.
2. Your new goal must be:
A passing grade
at least a 2 point improvement of your average.
Day 2 12-9
You do not have to write this down: Get out your test corrections and your test. Make sure you are done – we will be handing them in momentarily.
Extra Credit (ALL make up must be done first!!!): #s 41, 47, 48, 49, and 50 on page 122
Day 3 12-11
1. An atom has 9 protons, 10 electrons, and 10 neutrons.
What is the mass #?
What element is it?
What is the charge?
Draw the nuclear symbol?
Day 4 12-12
FF1919
99
-1-1
Read section 5.3 and answer #s 19, 20, 22, and 23 on page 148
Assignment
Extra Credit (ALL make up must be done first!!!): #s 41, 47, 48, 49, and 50 on page 122
Hand in any and all work from last week NOW:
Test corrections
Make up
page 148
Page 122 (extra credit)
Question of the Day:Day 5 12-15
What is the dual nature of light?
Radiant Energyis energy that travels travels through spacethrough space.
Is also known as lightlight and
electromagnetic electromagnetic radiationradiation.
Major source is…THE SUNTHE SUN
The dual nature of lightParticle??? Wave???
The dual nature – light can be viewed as a wave (continuous) OR a stream of extremely tiny, fast-moving particles (quantized)
The dual nature of lightParticle??? Wave???
- Wave (continuous) as it travels through space
- Particle (quantized) as it interacts with matter
Electromagnetic Spectrum
The ordered sequenceordered sequence of all types of lightlight or electromagnetic electromagnetic radiationradiation.
The part of the electromagnetic spectrum that humans can see is called the …
radio, micro, radar, IR, vis.
Electromagnetic Spectrum
vis., UV, X-ray, gamma, cosmic
Low, low
& Long!
High,
high &
short!
Violet-Violet-
High High energy, energy, bends more, bends more, inside of inside of rainbow, rainbow, 400 nm400 nm
R O Y G B I V
Red-Red-
Low Low energy, energy, bends less, bends less, outside of outside of rainbow, rainbow, 700 nm700 nm
The energy of green light compared to that of red light is ___________.
Read section 5.3 and answer #s 19-23 on page 148
- Due at the end of class Wednesday 12-17
Assignment
Light acts as a:
wave as it …
particle as it …
USE YOUR NOTES!!!
Day 6 12-16
Sir Isaac Newton……in the 1670in the 1670’’s, s, diffracted light diffracted light with a with a prismprism and…and…
Concluded that Concluded that each color of light each color of light has a unique has a unique wavelength… wavelength… energyenergy
Electromagnetic Spectrum
h
a
amplitude (a) - affects amplitude (a) - affects brightness, brightness, half the half the height height
Frequency (Frequency (νν) = number of ) = number of crests passing a crests passing a point in a point in a period of time period of time
speed (c) = distance per speed (c) = distance per unit timeunit time
wavelength (wavelength (λλ) = crest to ) = crest to crestcrest
λ = c/νwavelength
speed of light
frequency
λ = c ÷ νλ = wavelengthc = speed of light = 3.00 * 108 m/sν = fequency (s-1, Hz, 1/s)
Example Problem
λ = (3.00*108 m/s)÷(9.31*107 s-1)λ = 3.22 m
What is the wavelength if the frequency is 9.31*107 s-1
Max Planck- related the frequency of light to its energy energy with the following: E = h E=EnergyEnergy, h=Planckh=Planck’’s s
const.const.His idea was that energy is absorbed and released in specific amountsspecific amounts.
Quantum Theory
Page 1436.626e-34 J*s
His idea was that energy is absorbed and released in specific amountsspecific amounts. He called one piece, package, or bundle of energy one quantumquantum. Bundles of energy were called quantaquanta. He applied his quanta ideas to energy changes in atomsatoms:
Quantum Theory
He applied his quanta ideas to energy changes in atomsatoms: The energy of atoms is quantizedquantized.
Formerly, scientists had thought that all energy was continuous (wave-like)continuous (wave-like).
Quantum Theory
Read section 5.3 and answer #s 19-23 on page 148
- Due Wednesday 12-17
Assignment
1. Amplitude affects __________.
2. Shorter wavelengths = ______ frequencies
USE YOUR NOTES!!!
higher
brightness Day 3 12-19
λ = c/νwavelength
speed of light
frequency
E = h E=EnergyEnergy, h=Planckh=Planck’’s s const.const.
6.626e-34 J*s
Radiant Energyis energy that travels travels through spacethrough space.
Is also known as lightlight and
electromagnetic electromagnetic radiationradiation.
Major source is…THE SUNTHE SUN
The dual nature of lightParticle??? Wave???
- Wave (continuous) as it travels through space
- Particle (quantized) as it interacts with matter
amplitude (a) - affects amplitude (a) - affects brightness, brightness, half the half the height height
wavelength (wavelength (λλ) = crest to ) = crest to crestcrest
Read section 5.3 and answer #s 19-23 on page 148
- Due at the end of class Thursday 12-19
Assignment
1. What is another name for radiant energy?
2. What is the dual nature of light?
USE YOUR NOTES!!!
Day 6 1-6
λ = c/νwavelength
speed of light
frequency
E = h E=EnergyEnergy, h=Planckh=Planck’’s s const.const.
6.626e-34 J*s
Radiant Energyis energy that travels travels through spacethrough space.
Is also known as lightlight and
electromagnetic electromagnetic radiationradiation.
Major source is…THE SUNTHE SUN
The dual nature of lightParticle??? Wave???
- Wave (continuous) as it travels through space
- Particle (quantized) as it interacts with matter
amplitude (a) - affects amplitude (a) - affects brightness, brightness, half the half the height height
wavelength (wavelength (λλ) = crest to ) = crest to crestcrest
DemocritusDemocritus’’ atomatom
Quantized QuantizedMatter: Energy:PlankPlank
Continuous: VS. Quantized:
Height by step or Height by step or rungrung
Height on slide or rampHeight on slide or ramp
Continuous: VS. Quantized:
Ice cream scoopsIce cream scoopsSoft-serve ice creamSoft-serve ice cream
Continuous: VS. Quantized:
Come up with your own.Come up with your own.
Albert Einstein - Imagined that light energy traveled in bundles - photons.18 years later, Arthur
Compton experimentally demonstrated that light is comprised of tiny particles, or photons,
Quantum Theory
TODAY- Planck’s term quantum and Einstein’s term photon are used interchangeably.
demonstrated that light is comprised of tiny particles, or photons, that can collide with electrons and cause them to move.
Quantum Theory
TODAY- Planck’s term quantum and Einstein’s term photon are used interchangeably. Scientists also believe that light has properties of both waves and particles.
Quantum Theory
… - Dual nature of light
DEFINE:
energy level AND atomic orbital
AND Read section 5.1 AND answer
questions 1, 2, 4, and 5 on page 132
2 definitions and 4 questions