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Chapter 2: Atomic Structure and Periodicity SP2021
Suzanne
Part 1: Waves of Light
I. Definitions: Please use your textbook, notes, lecture PPT, or other resources to write the definition of each term.
• Electromagnetic Radiation –
• Wavelength (λ) –
• Frequency (ν) –
• Hertz (Hz) –
II. Calculating Wavelength and frequency, using c= ν λ, c = 2.998 x !"! "#
a. Violet light has a wavelength of 4.10 x 10!"# m. What is the frequency?
b. Green light has a frequency of 8.12 x 10"$ Hz. What is the wavelength?
c. A helium laser emits light with a wavelength of 633 nm. What is the frequency of the light?
Aasuierkey
radiant energy thatinhibits wavelike behavior and
travels
through space at the speed oflight in avacuum
7×10-7 ' 6×10-7 5×10-7 4×10-7
Red orange yellow Green Blue Indigoviolet
102 10-2 to- 4 co- 8 yo
- to10-12
RadioWaves Microwaves Infrared Ultraviolet Kray Gamma Ray
Low High
Longest Shortest
oatwugnthfm.info?arowa9esttowestthe number of crests of aware that
pass a stationary point of reference per second
SI unit for frequency1 HE = 15' = I cycle per second
#=V=,f= 3%71147=7.32×10"
Hz
E-¥ - X - E --
3.IE:76#aj=3.6axio-7m6.33xlO-7m run
✓ = ÷,
3×108 m/s6.gg#7my-- 4.74×10" Hz
Chapter 2: Atomic Structure and Periodicity SP2021
Suzanne
Part 2:
III. Definitions: Please use your textbook, notes, lecture PPT, or other resources to write the definition of each term.
• Quantum:
• Planck Constant:
• Quantum Theory:
o Quantized:
o Photon:
IV. Calculating Energy Using E = h‧ν, E = !"# , h = 6.626 x !"$%& J‧s
a. Calculate the energy of a photon of radiation with a frequency of 8.5 x 10"% Hz.
b. Calculate the energy of a gamma ray photon whose frequency is 4.05 x 10#& Hz.
c. What is the energy of light whose wavelength is 4.06 x 10!"" m?
Part 3: Photoelectric Effect
V. Definitions: Please use your textbook, notes, lecture PPT, or other resources to write the definition of each term.
• Photoelectric Effect –
• De Broglie’s Equation –
o Equation:
• Diffraction -
o Diffraction Pattern -
Part 4: Hydrogen Spectrum and Bohr Model
Smallest discrete quantity of a particular poem of energy
(h) proportionality constant between the energy and frequency q(Max Planck) edeathmagnetic radiation expressed
in E-ha,h = 6.626×10
-34J.s
a model based on the idea that energy is absorbed and emitted in discrete
quantities ofenergy called quanta .
having values restricted to whole number multiples ofa specific base value
a quantum of electromagnetic radiation
•*a
E-hv =/6 .626 x 10-34JOSX ( 8 . 5×10
's
=5
.
63×10-18 J
E-hv = ( 6.
626×10-34 (4.05×10204/3) = 2.68 x 10-13
E-had = 16.626×10-3457134108451 = 4.89×10-15J4.06 x 10-"m
the release of electrons from material as aresult
of electromagnetic radiation striking it
the scattering of light from a regular arrayq points or lines , producing
constructiveand destructive interference
Chapter 2: Atomic Structure and Periodicity SP2021
Suzanne
VI. Definitions/People: Please use your textbook, notes, lecture PPT, or other resources to write the definition of each term.
• Continuous Spectrum -
o Line Spectrum –
• Quantum Model -
• Niels Bohr –
o Equation –
• Ground State –
• Excited State –
• Electron Transition –
VII. Calculating Energy of a Transition Label whether it’s an emission or an absorption.
a. n = 5 à 4
b. n = 2 à 1
c. n = 1 à 3
d. n = 4 à 1
e. n = 5 à 3
a spectrum that exhibitsall wavelengths of visible lights
a spectrum showing onlycertain discrete wavelength Bohr's model
n= 4
- n=3
n=2a:÷÷¥on In onion
( 1885- lay2)Bohr's Model -- whyhydrogen atoms hose and gain discretequantaq
energy nucleus-whytheir electrons do not spiral
into their nuclei
• ⇒EET:SE- -2.178×10
- ''
J Lutz) AE- -2.178×10-''J (Tp -¥) •
•
the most stable,lowest energy
state ofa particle •
any energy above the ground state
movement of an electron
between energy levels
A E- -2.178×10-''J ( http -⇒
SE -- RH (Ta - ¥) = - 2.178×107 (Tu - If
= - 4.90×10-20
A E- -2.178×10-'8J ( http -÷)
---2.178×10
-'8J ( Y - I,)= - I . 63×10-18 J
E-- -2.178×10'8J(at - f)
= I . 936×10-18J
E = -2 .178×10
"J (T - ⇒
=-2
.04 x 10
-"
J
E = -2 . I 78×10- ' 8J (gt-⇒
=- I . 55×10
- '9J
Chapter 2: Atomic Structure and Periodicity SP2021
Suzanne
Part 5: More Examples
Perform the following calculations. Be sure to highlight the frequencies (it will help you in part two).
1. A mysterious wave has a frequency of 2.5 x 1013 Hz. What is the corresponding wavelength?
2. Another mysterious wave is about the size of a butterfly, or 0.010 m. What is the frequency of this wave?
3. In a different type of wave, the energy per photon was determined to be 2.12 x 10-16 J. What is the frequency of this wave?
4. Yesterday in Tallahassee, a strange wave in the atmosphere affected people’s ability to hear deep sounds. If the wavelength was a one kilometer, how much energy per photon did the wave contain?
5. Scientists in Siberia detected a wave with an energy of 3.85 x 10-13 J/photon. What was the wavelength?
6. One of the six groups of waves has a wavelength about the size of a virus cell. The frequency associated with these types of waves is 1.9 x 1016 Hz. How much energy per photon is there in one of these waves? Also, what is the approximate length of a virus cell?
¥ =
c- iv. x -E -- 126991×18%7%2=+1.2×10-5min
> Microwaves
a- I - 2%76%412=3.0 no" Hz-
V =( 2.12×10 - hey)
tray
6.63×10-3475=3-20×10"
Hy
Tnmkm = 1000 m 2.
a- ÷ :*::if¥..sn...am#....o..f::.:i::t:s::T700¥radiowavese-h.ro#*r=f::iIioIEIac--iv-o" ;÷÷÷÷÷÷÷¥ Gammy
V =5.81×1020 Hz
Chapter 2: Atomic Structure and Periodicity SP2021
Suzanne
Part Two
On the blank lines above or below the following diagram, write the frequency corresponding to the different waves. In the parentheses, write the question number from which the frequency value came from.
_________Hz( ) _______Hz( ) ________Hz( )
__________Hz( ) __________Hz( ) ________Hz( )
10
5.8*1020 s 1.9×10"
6 3.0×10 2i. 2.5×10"Hz2- 3.0×10"Hz3. 3.20×10"Hz4. 2.99×10543S. 8×1020/136. 1.9×10"Hz
-Gamma has the tfrequency,Radiowaveshastheta
17
3.20×10 3 2.5×10"
I 2.99×105 4
