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fluorine

/ˈflʊəriːn/
noun
1.
a toxic pungent pale yellow gas of the halogen group that is the most electronegative and reactive of all the elements, occurring principally in fluorspar and cryolite: used in the production of uranium, fluorocarbons, and other chemicals. Symbol: F; atomic no: 9; atomic wt: 18.9984032; valency: 1; density: 1.696 kg/m³; relative density: 1.108; freezing pt: –219.62°C; boiling pt: –188.13°C
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Word Value for fluorin

10
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