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What is the Lewis electron-dot diagram for a fluoride ion?
Fluorine is in Group 17 of ....................
And thus the neutral atom has 7 . Of course the elemental form is bimolecular.
Upon reduction, the fluorine atom forms fluoride, which has 8 , and is isoelectronic with a Noble Gas (which one?).
Which do you think would be bigger; fluorine atom or fluoride ion?