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Molecular Geometry: Page 3
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<font face="Verdana, Arial, Helvetica, sans-serif" size="5" color="#FFFFFF"><strong>Molecular Geometry:</strong> Electronic Geometry</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"> The arrangement of the electrons around an atom is called <b>electron geometry</b>. As the number of electron pairs increases, the geometry changes. </font></td>
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<img src="atomsBullet.png" width="33" height="23">
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<font face="Verdana, Arial, Helvetica, sans-serif" color="#a65d2c" size="5"><strong>Exploring
Electron Geometries and Molecular Shapes </strong></font>
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<tr>
<td colspan="2">
<img src="rule.png" width="18" height="6">
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<font face="Verdana, Arial, Helvetica, sans-serif" size="4"><b>Exploring
Electron Geometries and Molecular Shapes </b></font><br><font face="Verdana, Arial, Helvetica, sans-serif" size="4">Below
are three different geometrical shapes. Each one is an outline of a shape
that results from an arrangement of electrons around a central atom. </font>
<ol>
<li>
<b><font face="Verdana, Arial, Helvetica, sans-serif" size="4">Use
your mouse to rotate the geometries to get a feel for them in 3D. </font></b>
</li>
<li>
<b><font face="Verdana, Arial, Helvetica, sans-serif" size="4">Use the
menu under each model to view a real molecule that has that geometry
(choose "molecular shape") </font></b>
</li>
<li>
<b><font face="Verdana, Arial, Helvetica, sans-serif" size="4">To see
the electron geometry superimposed on the molecule, choose "both" from
the menu. </font></b>
</li>
<li>
<font face="Verdana, Arial, Helvetica, sans-serif" size="4">When you
have become familiar with each type of geometry, answer the questions
below the models.</font>
</li>
</ol>
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<font face="Verdana, Arial, Helvetica, sans-serif"><strong>Change View: </strong></font><strong><br></strong>
<select script3="script:jmol:1:select image all; remove; add image lewisCO2-1.gif (1,215);set display normal;select all; monitor on; spacefill 20%; wireframe 0.12" script2="script:jmol:1:select image all; remove; add image lewisCO2-1.gif (1,215);set display normal;select all; monitor off; spacefill 20%; wireframe 0.12" script1="script:jmol:1:select image all; remove; set display normal; monitor on; select all; spacefill 0.06; wireframe off">
<option selected>electron geometry
<option>molecular shape
<option>both
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<font face="Verdana, Arial, Helvetica, sans-serif"><strong>Change View: </strong></font><strong><br></strong>
<select script3="script:jmol:2:select image all; remove; add image lewisBF3.gif (1,215);set display normal;select all; monitor on; spacefill 20%; wireframe 0.12" script2="script:jmol:2:select image all; remove; add image lewisBF3.gif (1,185);set display normal;select all; monitor off; spacefill 20%; wireframe 0.12" script1="script:jmol:2:select image all; remove; set display normal; monitor on; select all; spacefill 0.06; wireframe off">
<option selected>electron geometry
<option>molecular shape
<option>both
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<font face="Verdana, Arial, Helvetica, sans-serif"><strong>Change View: </strong></font><strong><br></strong>
<select script3="script:jmol:3:select image all; remove; add image lewisCH4.gif (1,215);set display normal;select all; monitor on; spacefill 20%; wireframe 0.12" script2="script:jmol:3:select image all; remove; add image lewisCH4.gif (1,155);set display normal;select all; monitor off; spacefill 20%; wireframe 0.12" script1="script:jmol:3:select image all; remove; set display normal; monitor on; select all; spacefill 0.06; wireframe off">
<option selected>electron geometry
<option>molecular shape
<option>both
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<img src="atomsBullet.png" width="33" height="23">
</td>
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<font face="Verdana, Arial, Helvetica, sans-serif" color="#a65d2c" size="5"><strong>Matching
Electron Geometries and Regions of Electron Density </strong></font>
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<td colspan="2">
<img src="rule.png" width="18" height="6">
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<font face="Verdana, Arial, Helvetica, sans-serif" size="4">Below are
three boxes labeled with a different electron geometry at the top of each
one.<br><br><b>For each box below:</b> </font>
<ol>
<li>
<b><font face="Verdana, Arial, Helvetica, sans-serif" size="4">Read
the type of geometry at the top of the box. </font></b>
</li>
<li>
<b><font face="Verdana, Arial, Helvetica, sans-serif" size="4">Click
the Open button in the box to access the Gallery of Snapshots. </font></b>
</li>
<li>
<b><font face="Verdana, Arial, Helvetica, sans-serif" size="4">In the
Gallery, select the picture (from the ones you made on the previous
page) that shows the regions of electron density that match the
geometry for that box.</font></b>
</li>
<li>
<b><font face="Verdana, Arial, Helvetica, sans-serif" size="4">Drag
the picture from the Gallery into the box. </font></b>
</li>
</ol>
<font face="Verdana, Arial, Helvetica, sans-serif" size="4">If you need to
change your answer, click the Open button again and drag a different
picture to the box.</font>
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>Tetrahedral
</strong></font>
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>Trigonal
Planar </strong></font>
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>How many
regions of electron density are are around the central atom in a molecule
with </strong></font><strong><font face="Arial, Helvetica, sans-serif" color="maroon" size="4">linear
geometry?</font></strong>
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>How many
regions of electron density are around the central atom in a molecule with </strong></font><strong><font face="Arial, Helvetica, sans-serif" color="maroon" size="4">trigonal
planar geometry?</font></strong>
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<font face="Arial, Helvetica, sans-serif" size="4"><strong>How many
regions of electron density are around the central atom in a molecule with </strong></font><strong><font face="Arial, Helvetica, sans-serif" color="maroon" size="4">tetrahedral
geometry?</font></strong>
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