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Newton's Laws at the Atomic Level: Springs, bonds, and CSI.
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<font face="Verdana, Arial, Helvetica, sans-serif" size="5" color="#FFFFFF"><strong>Newton's Laws at the Atomic Level:</strong> Springs, bonds, and CSI.</font>
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<td><img src="atomMainIdea.png" width="98" height="58"></td>
<td><font face="Verdana, Arial, Helvetica, sans-serif" size="4">Different molecules vibrate in different ways, AND they interact with light? How can we use this to identify chemicals?</font></td>
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<font face="Verdana, Arial, Helvetica, sans-serif" size="4">A covalent
bond behaves much the same way as a spring. However, the bond is not
really a stick. It's a strong attraction between atoms that allows for the
molecule to vibrate.</font>
<p>
<font face="Verdana, Arial, Helvetica, sans-serif" size="4">Below is a
model of a molecule, and a graph representing the <a href="script:page:0:message vibFreq.html">vibrational
frequency</a> of the molecule. The factors that affect the vibrational
frequency of a molecule (or bond) are the strength of the covalent bond
and the mass of the atoms bonded together. Experiment with these factors
and answer the questions below. </font>
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org.concord.modeler.text.LineIcon295.025555<html><body style="margin-top:5"><div align="center"><font face="Arial" size="3"><strong>Vibrational Frequency</strong></font></div></body></html>-695c42
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8org.concord.modeler.text.LineIcon295.0305510<html><body style="margin-bottom:5"><div align="center"><font face="Arial" size="3">time</font></div></body></html>-695c42
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>How does atom
mass affect the <a href="script:page:0:message vibFreq.html">vibrational
frequency</a> of the bonded atoms?</strong></font>
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higher mass causes higher frequency
lower mass causes lower frequency
higher mass causes lower frequency
there is no effect of mass on frequency
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>How does the
strength of the bond affect the <a href="script:page:0:message vibFreq.html">vibrational
frequency</a> of the bonded atoms?</strong></font>
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stronger bond causes higher frequency
weaker bond causes higher frequency
stronger bond causes lower frequency
there is no effect of bond strength on frequency
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>How does <a href="script:page:0:message newtonsLaws.html">Newton's
second law</a> help explain the relationship between bond strength, atom
mass, and vibrational frequency?</strong></font>
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>How do <a href="script:page:0:message newtonsLaws.html">Newton's
first and third laws</a> help explain the molecule as a whole is not
moving, up, down, left, or right within the model container?</strong></font>
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>The connection
between light and molecules is complex, but it basically comes down to
this: Infrared light comes in many varieties, just like visible light
comes in many colors. If you shine an infrared light on a substance, and
the light has the same frequency as some of the bonded atoms, then that
light will be absorbed by the substance. </strong></font>
<p>
<font face="Arial, Helvetica, sans-serif" size="4"><strong>Considering
that information, answer the following question: If you shined an
infrared light with a high frequency on a substance and that light was
absorbed, what can you tell about at least some of the bonds and/or
atoms in that substance? Explain your reasoning.</strong></font>
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