An ion is an atom or ____ with a net ____ formed through the gain or ____ of electrons. A ____ is formed from the loss of electrons. An anion is formed from the ____ of electrons. The ____ gases do not form ions, as they already have a ____ ____ outer shell of electrons, making them ____. Molecular ions are formed when ____ of two or more atoms that are ____ bonded gain or lose electrons. Ionic compounds are composed of ____ charged ions. The overall charge is ____ as the ionic charges balance.

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