fluorine
noun/ˈflʊəriːn/
Frequency rank: #17,105 of 20,003 in the WORDED list (wordfreq data)
Meaning
a pale yellow, highly reactive gaseous chemical element with atomic number 9, belonging to the halogen group.
Example sentence
Scientists handle fluorine with extreme caution because it is the most reactive of all elements.
Synonyms & related words
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