Fluorine isn't just chasing Sully through the hallways of Monsters University - it's chasing electrons from literally anything on the periodic table! With its 7 valence electrons, fluorine is just one shy of a full octet, making it the most electronegative element in existence. It will straight-up mug other elements for that sweet, sweet electron to achieve noble gas configuration. Even noble gases aren't safe from this electron-hungry monster. Chemistry professors weren't kidding when they said fluorine doesn't ask for electrons - it takes them.
Fluorine: The Electron Thief

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