Printhttp://en.wikipedia.org/wiki/Periodic_table
http://www.chemicool.com/
http://www.lenntech.com/periodic/periodic-chart.htm
http://periodic.lanl.gov/index.shtml
http://www.periodictable.com/
http://www.rsc.org/periodic-table
http://periodic.lanl.gov/images/periodictable.pdf
http://go.hrw.com/resources/go_sc/periodic/SSHK1PER.PDF
http://www.periodni.com/download.html
http://genesismission.jpl.nasa.gov/educate/scimodule/UnderElem/UnderElem...
http://physiology.med.cornell.edu/faculty/mason/lab/zumbo/files/ZUMBO_pe...
http://biochemhelp.com/electron-configuration-of-every-element-in-the-pe...
http://www.udel.edu/chem/sametz/101Fall09/Ch7temp.pdf
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