document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=181205>Question 181205</A>: <I><SPAN STYLE=\"word-break: break-all;\"> In a crystal of Platinum , the centers of the atoms are 2.8 Angstroms apart along the direction of the closest packing .  How many atoms would lie on a one-centimeter line in this direction .   Please explain in detail step+by+step , Mike .    P.S-the answer is 3.5*10^7 atoms , hope to hear from you soon .    </SPAN>\n" );
document.write( "</I><HR><TABLE width=100%><TR><TD><B><A HREF=http://www.algebra.com/>Algebra.Com's</A> Answer #135860 by </B><A HREF=/tutors/aboutme.mpl?userid=Alan3354><B>Alan3354(69443)</B></A><img src=\"/images/stars/stars-13.gif\" alt=\"\" >&nbsp;<A HREF=/tutors/aboutme.mpl?userid=Alan3354><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=Alan3354><BR>You can <A HREF=\"/cgi-bin/embed-solution.mpl?show=1&solution=135860\">put this solution on YOUR website!</A><BR><SPAN STYLE=\"word-break: break-all;\"> In a crystal of Platinum , the centers of the atoms are 2.8 Angstroms apart along the direction of the closest packing . How many atoms would lie on a one-centimeter line in this direction .<BR>\n" );
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document.write( "1 Angstrom = 10^-10 meters = 0.1 nanometer (Angstroms aren't used much, no longer common)<BR>\n" );
document.write( "2.8 A = 0.28 nanometers = 0.28*10^-9 meters<BR>\n" );
document.write( "1 cm = 0.01 meter<BR>\n" );
document.write( "0.01 meters/0.28*10-9 meters = 1/28 *10^9 atoms<BR>\n" );
document.write( "= 100/28*10^7 atoms<BR>\n" );
document.write( "= 3.57*10^7 atoms </SPAN>\n" );
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