Element Electron Orbitals/Emission Spectrum Common Compound(s)/Application(s)
9
Fluorine (F)
Sodium Fluoride (NaF)/Toothpaste
Uranium Hexfluoride (UF6)/Uranium transportation
Boron Trifluoride (BF3)/Neutron Detector
Hydrofluoric Acid (HF)/Glass Etching
Teflon (CnF2n+2)/Nonstick Frying Pans
F18 (Half Life = 110 mins.)/PET Scan
17
Chlorine (Cl)
Sodium Hypochlorite (NaClO)/Bleach, Disinfectant
Hydrochloric Acid (HCl)/Digestive Juice (in Stomach), Metel Treatment (to Remove Rust)
Polyvinyl Chloride (PVC, (H2C2HCl)n)/Plastic (for Pipes and Bottles)
35
Bromine (Br)
Sodium Bromide (NaBr)/Hot Tub Disinfectant, Sedative
Silver Bromide (AgBr)/Photographic Films
Methyl Bromide (CH3Br)/Pesticide
53
Iodine (I)
Potassium Iodide (KI, 0.01% in Iodine Salt)/Goiter Prevention
Silver Iodide (AgI)/Photographic Films, Cloud-seeding
~ (in Alcohol)/Antiseptic
I131 (Half Life = 8 days)/Diagnosing Thyroid Diseases
85
Astatine (At)
 

Group 17 Elements