fluorine

oxygen$\longleftarrow$ 9 $\longrightarrow$neon

Pronunciation

• IPA ^(key): /ˈflɔːrɪn/

• Audio (US)

  (file)

• Hyphenation: flou‧rine

Noun

Singular fluorine

Plural none

1. Fluorine is a yellow gas that has an atomic number of 9 and the symbol F.

   Fluorine reacts very easily.

   Fluoride toothpaste contains a compound of fluorine.