University of South Florida
CHM 2045
PL Activity 7
6.1 Electromagnetic Radiation
1a. Complete the following table, filling in the missing information for each row:
(c = λ ∙ ν, E = h ∙ ν)
(1m = 109 nm, 1 Hz = 1 s-1, c = 3.00 ´ 108 m/s, h = 6.626×10-34 J ∙ s)
ν (frequency) Hz λ (wavelength) nm E (energy of a photon) J
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PL Activity 7
6.1 Electromagnetic Radiation
1a. Complete the following table, filling in the missing information for each row:
(c = λ ∙ ν, E = h ∙ ν)
(1m = 109 nm, 1 Hz = 1 s-1, c = 3.00 ´ 108 m/s, h = 6.626×10-34 J ∙ s)
ν (frequency) Hz λ (wavelength) nm E (energy of a photon) J
5.00 X 1012 Hz
5.10 X 10-19 J
1b. For the second row in the above table, solve for the energy of one mole of photons
(NA = 6.022 ´ 1023/ mol).
1c. If the frequency of light increases, what would happen to the wavelength? Energy?
6.2 Bohr’s Model
2. What is the frequency of a photon emitted from an electron transition from n = 6 to n = 2 in a
hydrogen atom?
E= h ∙ ν, h = 6.626 ´ 10-34 J ∙ s
∆"!"#$ = -2.18 × 10%&' , - 1
.
()*!+
, -
1
.
)*)")!+
, /
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