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Molecular Geometry
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Electronic Geometry
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<font size="4" face="Verdana, Arial, Helvetica, sans-serif">The
arrangements of electrons around a central atom are called <b>electron
geometries</b>. When atoms share electrons to form a molecule, these are
the positions that the bonds will occupy. </font>
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org.concord.modeler.text.LineIcon750.03010515<html><body align="center"><strong><font size="5" face="Verdana, Arial, Helvetica, sans-serif" color="rgb(051, 051, 051)">Exploring Electron Geometries and Molecular Shapes </font></strong></body></html>-458704
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<b><font size="4" face="Verdana, Arial, Helvetica, sans-serif">Exploring
Electron Geometries and Molecular Shapes </font></b><br><font size="4" face="Verdana, Arial, Helvetica, sans-serif">Below
are three different geometrical shapes. Each one outlines a shape that
results from an arrangement of electrons around a central atom. </font>
<ol>
<li>
<b><font size="4" face="Verdana, Arial, Helvetica, sans-serif">Use
your mouse to rotate the geometries to get a feel for them in 3D. </font></b>
</li>
<li>
<b><font size="4" face="Verdana, Arial, Helvetica, sans-serif">Use the
menu under each model to view a real molecule that has that geometry
(choose "molecular shape") </font></b>
</li>
<li>
<b><font size="4" face="Verdana, Arial, Helvetica, sans-serif">To see
the electron geometry superimposed on the molecule, choose "both" from
the menu. </font></b>
</li>
<li>
<font size="4" face="Verdana, Arial, Helvetica, sans-serif">When you
have become familiar with each type of geometry, answer the questions
below the models.</font>
</li>
</ol>
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<strong><font face="Verdana, Arial, Helvetica, sans-serif">Change View: </font><br></strong>
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<strong><font face="Verdana, Arial, Helvetica, sans-serif">Change View: </font><br></strong>
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<strong><font face="Verdana, Arial, Helvetica, sans-serif">Change View: </font><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
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org.concord.modeler.text.LineIcon750.03010515<html><body align="center"><strong><font size="5" face="Verdana, Arial, Helvetica, sans-serif" color="rgb(051, 051, 051)">Matching Electron Geometries and Regions of Electron Density </font></strong></body></html>-458704
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<font size="4" face="Verdana, Arial, Helvetica, sans-serif">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 size="4" face="Verdana, Arial, Helvetica, sans-serif">Read
the type of geometry at the top of the box. </font></b>
</li>
<li>
<b><font size="4" face="Verdana, Arial, Helvetica, sans-serif">Click
the Open button in the box to access the Gallery of Snapshots. </font></b>
</li>
<li>
<b><font size="4" face="Verdana, Arial, Helvetica, sans-serif">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 size="4" face="Verdana, Arial, Helvetica, sans-serif">Drag
the picture from the Gallery into the box. </font></b>
</li>
</ol>
<font size="4" face="Verdana, Arial, Helvetica, sans-serif">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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<strong><font size="4" face="Arial, Helvetica, sans-serif">How many
regions of electron density are present in a molecule with </font><font size="4" color="maroon" face="Arial, Helvetica, sans-serif">linear
geometry?</font></strong>
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<strong><font size="4" face="Arial, Helvetica, sans-serif">How many
regions of electron density are present in a molecule with </font><font size="4" color="maroon" face="Arial, Helvetica, sans-serif">trigonal
planar geometry?</font></strong>
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<strong><font size="4" face="Arial, Helvetica, sans-serif">How many
regions of electron density are present in a molecule with </font><font size="4" color="maroon" face="Arial, Helvetica, sans-serif">tetrahedral
geometry?</font></strong>
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