https://en.wikipedia.org/wiki/Periodic_table
Site
http://www.ptable.com/
Conductivity
http://environmentalchemistry.com/yogi/periodic/electrical.html
Videos
http://www.periodicvideos.com/
Web
http://www.webelements.com/
Org
http://www.rsc.org/periodic-table
Gov
http://periodic.lanl.gov/index.shtml
Tube
https://www.youtube.com/results?search_query=periodic+table
Slides
http://www.slideshare.net/search/slideshow?searchfrom=header&q=periodic+table
Site
http://www.ptable.com/
Conductivity
http://environmentalchemistry.com/yogi/periodic/electrical.html
Videos
http://www.periodicvideos.com/
Web
http://www.webelements.com/
Org
http://www.rsc.org/periodic-table
Gov
http://periodic.lanl.gov/index.shtml
Tube
https://www.youtube.com/results?search_query=periodic+table
Slides
http://www.slideshare.net/search/slideshow?searchfrom=header&q=periodic+table