Element	Electron Configuration/Emission Spectrum	Common Compound(s)/Application(s)
5 Boron (B)		~ Nitride (BN)/Cutting Steel Sodium Borate (Borax, Na2B4O710H2O)/Laundry Aid Boric Acid (H3BO3)/Eyewash, Antiseptic, Insecticide
13 Aluminum (Al)		~ Oxide (Al2O3)/Sandpaper, Grinding Tool ~ Oxide + Chromium/Ruby ~ Oxide + Iron, Titanium/Sapphire ~/Airplane Wings, Cook Wares, etc.
31 Gallium (Ga)		~ Arsenide (GaAs)/Laser Diode, Light-emitting Diode (LED) ~/Computer Chips, Neutrino Detector
49 Indium (In)		~ Tin Oxide (90% In2O3 + 10% SnO3)/LCD Screen ~/High Vacuum Sealer, Nuclear Reactor Control
81 Thallium (Tl)		~ Sulfide (Tl2SO4)/Infrared Detector ~ Tl201 (1/2 Life = 73 hrs)/Heart Disease Diagonsis

Group 13 Elements