Resources
Ionization Energies -
https://dept.astro.lsa.umich.edu/~cowley/ionen.htm
Periodic Table of Elements -
www.webelements.com
Scientific Instrument Services, Inc. -
Isotope Distribution Calculator and Mass Spec Plotter
Symmetry Tutorial -
http://symmetry.otterbein.edu/tutorial/index.html
National Historic Chemical Landmark:
Production of Aluminum: The Hall-Héroult Process
NOVA:
http://www.pbs.org/wgbh/nova/physics/hunting-elements.html