Question

why F2 plus F- not form
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Answer 1

Answer:

Fluorine gas in the diatomic F2FX2 is essentially the the covalent pair of fluorine atoms (as fluorine is a non-metal), as seen in the diagram below:



Image source

In the reaction you describe:

2Li(s)+F2(g)⟶2LiF(s)2Li(s)+FX2(g)⟶2LiF(s)

requires the fluoride ion be in an ionic bond with the lithium ion, twice (to balance the equation).



Answer 2

Answer:

F2-F=F

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