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<font face="Verdana, Arial, Helvetica, sans-serif" size="5" color="#FFFFFF"><strong>Summary</strong></font>
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<td><img src="lightMainIdea.png" width="98" height="58"></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="4">
Spectroscopy is a powerful tool for identifying atoms. An atom's spectrum is like its fingerprint −− unique to that particular kind of atom. Since every type of atom emits and absorbs only photons of particular frequencies, one can compare patterns of spectral emissions in order to identify the atomic constituents of matter.
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<font color="#5d6b86" face="Verdana, Arial, Helvetica, sans-serif" size="5"><strong>Questions</strong></font>
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>A certain atom
has only two excited states. How many spectral lines can it produce at
maximum?</strong></font>
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>Is it possible
for two different types of atom to have exactly the same spectra but not
have exactly the same energy levels?</strong></font>
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<html>They can't have the same spectrum because every atom is different.</html>
<html>They could in principal, but it would mean that they had exactly the same energy levels.</html>
<html>They could but it would mean that they had exactly the same differences between their energy levels.</html>
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>A
scientist measured the spectrum of a gas supposedly composed purely
of Type-C atoms, but he found the spectrum revealed that the gas was
contaminated. Can you identify which type of atoms could have
possibly contaminated the gas?</strong></font>
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<img src="mixture.gif">
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<font face="Arial, Helvetica, sans-serif" size="3">(The box in the
above image shows the spectra of four types of atoms: A, B, C and D.
The spectrum below the box shows the result he obtained.)</font>
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Type A
Type B
Type D
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>Of the
following transitions between the energy levels shown in the right
graph, which results in photons with the lowest possible frequency?</strong></font>
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<img src="level.gif">
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<p class="firstp" align="center"><strong>You have reached the end of the activity.<BR>Please submit a report.</strong></p>
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Create a report of my work.
Spectroscopy
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