document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=68331>Question 68331</A>This question is from textbook <A HREF=http://www.amazon.com/exec/obidos/ASIN/0805339701/algebrahomeworkh>An Introduction to Chemistry for Biology Students</A><BR>\n" );
document.write( ": <I><SPAN STYLE=\"word-break: break-all;\"> Have not had algebra since age 15, now 45.  I am taking a human biology course, and it deals with chemistry/atoms, etc.  Which involves math equations.\r<BR>\n" );
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document.write( "I am totally lost and in need of help. And I can't go forward without understanding this and I need to know this material BEFORE I begin my class. Please Help!\r<BR>\n" );
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document.write( "In regards to an Atom, Electrons have energy levels and consist of layers beginning with the most outer edge and work toward the center (the nucleus).  There is a maximum number of electrons per energy level.  The max number may be determined by using formula X = 2n (small 2 placed up and to the right of n).  I assume this means squared?\r<BR>\n" );
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document.write( "This is what they gave me and it is in parts, so forgive me if I've over asked, but if I understand the equations, then the rest will fall into place, if you will.\r<BR>\n" );
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document.write( "With the formula X=2n squared, n=1, then X= ?  The answer is 2.  Why/How?\r<BR>\n" );
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document.write( "So the next energy level of the electron is X=2n squared, n=2, then X=?  The answer is 8.  Why/How?\r<BR>\n" );
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document.write( "So the 3rd energy level of the electron is X=2n squared, n=?, then X=? The answer  for X is 18?  Why/How and what would then be the answer to n?\r<BR>\n" );
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document.write( "Same for the 4th level only the answer for X is then 32.  Why/How and what would then be answer to n? at this level?  \r<BR>\n" );
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document.write( "I know this is a very simple thing, but I am drawing a blank here obviously and just not sure how to calculate the formula going forward.  Thank you for this forum and also a huge thank you in advance for your helping me!\r<BR>\n" );
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document.write( "A very frustrated again student after almost 30 years!  \r<BR>\n" );
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document.write( "Tammy Llewellyn from VA </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #48609 by </B><A HREF=/tutors/aboutme.mpl?userid=ptaylor><B>ptaylor(2198)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=ptaylor><IMG SRC=http://www.algebra.com/images/aboutme-small.gif BORDER=0 alt=\"About Me\" VALIGN=MIDDLE></A>&nbsp;<IMG SRC=http://www.algebra.com/cgi-bin/show-face.mpl?user=ptaylor><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=48609\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> The number of electrons that an energy level can hold is given by:\r<BR>\n" );
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document.write( "<IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=X=2n%5E2 ALIGN=MIDDLE  ALT=\"X=2n%5E2\"   DISABLED_style= \"max-width:90%; height:auto;\" >  where n is the energy level\r<BR>\n" );
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document.write( "when n=1, then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=X=2%281%29%5E2=2 ALIGN=MIDDLE  ALT=\"X=2%281%29%5E2=2\"   DISABLED_style= \"max-width:90%; height:auto;\" >   2 times 1 squared<BR>\n" );
document.write( "when n=2, then  <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=X=2%282%29%5E2=8 ALIGN=MIDDLE  ALT=\"X=2%282%29%5E2=8\"   DISABLED_style= \"max-width:90%; height:auto;\" > 2 times 2 squared (2 squared is 4)<BR>\n" );
document.write( "when n=3, then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=X=2%283%29%5E2=18 ALIGN=MIDDLE  ALT=\"X=2%283%29%5E2=18\"   DISABLED_style= \"max-width:90%; height:auto;\" > ditto<BR>\n" );
document.write( "when n=4, then <IMG STYLE=\"max-width:80%;\" SRC=/cgi-bin/plot-formula.mpl?expression=X=2%284%29%5E2=32 ALIGN=MIDDLE  ALT=\"X=2%284%29%5E2=32\"   DISABLED_style= \"max-width:90%; height:auto;\" > ditto\r<BR>\n" );
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document.write( "etc\r<BR>\n" );
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document.write( "Hope this helps-----ptaylor<BR>\n" );
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