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Spectroscopy: Identifying Unknown Atoms
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<font size="5" color="#FFFFFF" face="Verdana, Arial, Helvetica, sans-serif"><strong>Spectroscopy:</strong>
Identifying Unknown Atoms</font>
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<font size="4" face="Verdana, Arial, Helvetica, sans-serif">The
spectra of atoms are like fingerprints - each atom produces a
different set of spectral lines when it radiates photons.</font>
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<b>The Challenge</b>: Use the spectroscope below to determine the identity
of an unknown species of atom. These atoms are represented as question
marks in the model.<br><br>There is a theory that the unknown atoms are
actually one of the four known kinds of atoms: Type-1, Type-2, Type-3, and
Type-4 atoms. Your job is to try to confirm that theory and if it is true,
figure out which type of atom the unknown ones are.<br><br><b>What to do:</b>
<ul>
<li>
Put one type of the known atoms into the model at a time (<b>but do
not try to mix different types</b>).
</li>
<li>
Let the model run until it automatically stops.
</li>
<li>
Take a snapshot of the spectrum as instructed.
</li>
<li>
Clear the model. Using the "Clear all atoms" button. Run this process
for each known type once before loading the unknown type.
</li>
</ul>
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<strong>Place a snapshot of Type-1 atoms' spectrum here. </strong>
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<strong>Place a snapshot of Type-2 atoms' spectrum here. </strong>
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<strong>Place a snapshot of Type-3 atoms' spectrum here. </strong>
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<strong>Place a snapshot of Type-4 atoms' spectrum here. </strong>
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<strong>Place a snapshot of the unknown atoms' spectrum here. </strong>
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<font size="4" face="Arial, Helvetica, sans-serif"><strong>Which type is <i>most
likely</i> the unknown atom? (Note: the spectra may not be exactly
identical. Look for the one that looks closest.)</strong></font>
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Type-1.
Type-2.
Type-3.
Type-4.
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</a><a href="page1.cml"><img border="0" height="26" src="page1.jpg" width="28">
</a><a href="page2.cml"><img border="0" height="26" src="page2.jpg" width="28">
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