The following websites provided information used on this website:
http://0.tqn.com/d/chemistry/1/0/D/d/1/PeriodicTableWallpaper.jpg
http://www.madsci.org/posts/archives/nov99/943417768.Ph.1.gif
http://en.wikipedia.org/wiki/Group_(periodic_table)
http://www.dynamicscience.com.au/tester/solutions/chemistry/atomic%20structure/corechargeionisation.htm
http://en.wikipedia.org/wiki/Periodic_table_period
http://chemwiki.ucdavis.edu/@api/deki/files/6683/=Ionization_Energy_Trend_IK.png
http://en.wikipedia.org/wiki/Ionization_energy
http://dl.clackamas.cc.or.us/ch104-06/ionic_size.htm
http://en.wikipedia.org/wiki/Electronegativity
http://chemistry.about.com/od/periodicitytrends/a/Metallic-Character.htm
http://0.tqn.com/d/chemistry/1/0/D/d/1/PeriodicTableWallpaper.jpg
http://www.madsci.org/posts/archives/nov99/943417768.Ph.1.gif
http://en.wikipedia.org/wiki/Group_(periodic_table)
http://www.dynamicscience.com.au/tester/solutions/chemistry/atomic%20structure/corechargeionisation.htm
http://en.wikipedia.org/wiki/Periodic_table_period
http://chemwiki.ucdavis.edu/@api/deki/files/6683/=Ionization_Energy_Trend_IK.png
http://en.wikipedia.org/wiki/Ionization_energy
http://dl.clackamas.cc.or.us/ch104-06/ionic_size.htm
http://en.wikipedia.org/wiki/Electronegativity
http://chemistry.about.com/od/periodicitytrends/a/Metallic-Character.htm