Fluorine

Fluorine is a chemical element; it has symbol F and atomic number 9. It is the lightest halogen and exists at standard conditions as pale yellow diatomic gas. Fluorine is extremely reactive as it reacts with all other elements except for the light noble gases. In its elemental form it is highly toxic.

French chemist (1852–1907)

set of fusion reactions by which stars convert hydrogen to helium: 4¹H+2e⁻→⁴He+2e⁺+2e⁻+2νₑ+3γ+24.7 MeV→⁴He+2νₑ+3γ+26.7 MeV

addition of fluoride to a water supply to reduce tooth decay

human disease

therapeutic use of fluorine

medical condition

bone disease caused by excessive accumulation of fluoride in the bones

covalent bond between carbon and fluorine atoms

analytical technique

type of excimer laser

used in the production of semiconductor integrated circuits, eye surgery, micromachining, and scientific research

1930 natural disaster