Element Electron Orbitals/Emission Spectrum Common Compound(s)/Application(s)
4
Beryllium (Be)
~ Copper Alloy/Tools for Explosive environments
~/Missile and Rocket Parts, Windows of X-ray Tubes
12
Magnesium (Mg)
~ Aluminum Alloy/Light Structural Material
Milk of ~ (Mg(OH)2)/Antacid
~/Essential Mineral for Human Nutrition
20
Calcium (Ca)
~ Sulfate (CaSO4)/Chalk
~ Sulfate Dihydrate (CaSO4.2H2O)/Plaster
~ Carbonate (CaCO3)/Marine Shell, Marble
~ Hydroxide (Ca(OH)2)/Cement Ingradient
~ Oxide (CaO)/Production of iron from its ores
~ Hydroxyapatite (Ca10(PO4)6(OH)2)/Bones
~/Biochemistry of body cells
38
Strontium (Sr)
~ Aluminate (SrAl2O4)/Luminous Paints (via the phosphorescence process)
~ Acetate (Sr(C2H3O2)2)/Toothpaste for relieving pain of sensitive teeth
56
Barium (Ba)
~ Sulfate (BaSO4)/Intestinal Tract X-ray Photo
~/Getter for Vacuum Tube
88
Radium (Ra)
~ + Zinc Sulfide (ZnS)/Luminous Paints
~/Standard Unit of Radiation = Curie = Radiation from 1 gm of Ra, Generation of Radioactive Gas (Radon) for Cancer Therapy, Portable Source of Neutron Radiation

Group 2 Elements