Talk:Dividing line between metals and nonmetals

External links modified
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 * Added archive https://web.archive.org/web/20120514182242/http://dwb4.unl.edu/chem_source_pdf/PERD.pdf to http://dwb4.unl.edu/chem_source_pdf/PERD.pdf
 * Added archive https://web.archive.org/web/20120516013438/http://www.chemprofessor.com/outline4b.htm to http://www.chemprofessor.com/outline4b.htm

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Cheers.— InternetArchiveBot  (Report bug) 04:01, 14 December 2016 (UTC)