Element	Electron Orbitals/Emission Spectrum	Common Compound(s)/Application(s)
22, Group 4 Titanium (Ti)		~ Dioxide (TiO₂)/Opaque Paints, Sun Tan Lotions ~ Tetrachloride (TiCl₄)/Smoke Screens ~/Jet Engines, Rockets, and High Quality Tools
24, Group 6 Chromium (Cr)		~ Oxide (Cr₂O₃)/Green Pigment, Audio Tape Coating ~ Iron, Nickel Alloy/Stainless, Heating Elements ~/Energy Storage in Ruby Laser, Decorative and Protective Plating over Other Metals, Coloring in Gemstones, e.g., Alexandrite, Emerald, Ruby
26, Group 8 Iron (Fe)		~ Nickel Alloy/Structural Material for Buildings ~ Tungsten, Vanadium Alloy/Cutting Tools at High Temperature ~ Manganese Alloy/Rifle Barrels, Power Shovels ~ Carbon, Silicon Alloy (Cast Iron)/Pipe, Machine Parts, Cook Wares ~/In Hemoglobins and Other Proteins
28, Group 10 Nickel (Ni)		~ Oxide Hydroxide (NiOOH)/Cadmium Betteries ~/Layer of Protective Coating to Iron and Copper
29, Group 11 Copper (Cu)		~ Zinc Alloy (Brass)/Pipes, Wires, Gears, etc. ~ Tin or + Phosphorus, Manganese, Aluminum, Silicon Alloy (Bronze)/Ship Propellers, Bearings, Springs, Sculptures, Musical Instruments ~/Thermal and Electrical Conductors
46, Group 10 Palladium (Pd)		~ /Automobile Catalytic Converter, Hydrogen Absorber, Cold Fusion (unsubstantiated claim)
47, Group 11 Silver (Ag)		~ Copper Alloy (Sterling Silver)/Jewelry ~ Mercury Solution/Tooth Fillings ~ Bromide (AgBr)/Photographic Films ~ Chloride (AgCl)/Photochromic Sunglass, Stained Glass, Photographic Films, Bandages ~ Iodide (AgI)/Clouding Seeding ~/Best Thermal and Electrical Conductors, Protective Coating, Most Reflective Mirror Material
79, Group 11 Gold (Au)		~ Nickel or Copper Alloy (18-carat gold)/Jewelry ~/Non-tarnishable Electrical Conductors, Basis of Monetary System
80, Group 12 Mercury (Hg)		~ Chloride (HgCl or HgCl₂)/Fungicide, Pesticide ~/Thermostats, Thermometers, Fluorescent Lamps
92, Group 3 Uranium (U)		U²³⁵/Atomic Bomb, Nuclear Reactor U²³⁸/Breeder Reactor, Armor-piercing Antitank Shell, Missile Re-entry Ballast, Ceramic Glaze, Rock Dating

Groups 3 - 12 Elements