1
1
What is the energy difference between the two
states of mercury that are associated with the
emission of 404 nm light?
Draw an energy level diagram to represent
what this question is asking you to find?
Calculate the result.
h = 6.626 x 10
-34
J s
c = 3.00 x 10
8
m/s
A) 4.92 x 10
-26
J
B) 4.92 x 10
-19
J
C) 4.92 x 10
-17
J
D) Some other answer
not close to these.
E
atom
= E
photon
E
photon
= h
= hc/
2
= 404 nm
photon emitted
Asked to find the energy
difference between the two
energy levels.
Need the relationship
between
E
atom
and E
photon
.
Need the relationship
between E
photon
and photon
wavelength.
E
atom
= E
photon
E
photon
= h
= hc/
h = 6.626 x 10
-34
J s
c = 3.00 x 10
8
m/s
34
8
19
9
6.63 10
3.00 10
/
4.92 10
404 10
x
Js
x
m s
x
J
x
m
Energy
Level
Diagram

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