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The following atomic line spectra display six of the more prominent lines observed in the visible region for the indicated element. The number by each line represents its the relative intensity. A photograph of the actual spectrum of the element may show many more lines, or sometimes fewer lines, depending on the overall intensity of the spectrum. If two lines are within 1 nm of each other, they are shown as a single line. You can find a complete listing of the lines for each element at the
NIST Atomic Spectra Database
.
Some spectral lines of Sodium:
Identify the line in the spectrum of Na with each of the following characteristics:
A
B
C
D
E
F
light with a photon energy of 3.987×10
-19
J/photon.
A
B
C
D
E
F
light with a frequency of 6.901×10
14
s
-1
.
A
B
C
D
E
F
light with a photon energy of 290.8 kJ/mol.
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Some spectral lines of Strontium:
Identify the line in the spectrum of Sr with each of the following characteristics:
A
B
C
D
E
F
light with a frequency of 6.507×10
14
s
-1
.
A
B
C
D
E
F
light with a photon energy of 293.4 kJ/mol.
A
B
C
D
E
F
light with a photon energy of 4.003×10
-19
J/photon.
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Some spectral lines of Neon:
Identify the line in the spectrum of Ne with each of the following characteristics:
A
B
C
D
E
F
light with a photon energy of 2.867×10
-19
J/photon.
A
B
C
D
E
F
light with a frequency of 4.683×10
14
s
-1
.
A
B
C
D
E
F
light with a photon energy of 221.5 kJ/mol.
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You must get the above parts correct to obtain access to a table of spectral data that you can use to identify the following spectra as well as the unknowns in your laboratory experiment:
Al
Ar
Cd
Cr
Cs
Cu
He
Hg
Kr
Li
Na
Ne
Sr
Xe
Zn
Identify the element giving the following visible spectrum:
Al
Ar
Cd
Cr
Cs
Cu
He
Hg
Kr
Li
Na
Ne
Sr
Xe
Zn
Identify the element giving the following visible spectrum:
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