Covalent: When electrons are shared, Between 2 nonmetals, H2, O is an example of this, Use prefixes to name them, Overall charge is partially positive and partially negative, Tetraoxygen difluoride , Ionic: When electrons are completely lost or gained, Between metal and nonmetal, Na, Cl is an example of this, Do not use prefixes to name them, Overall charge is neutral/0, Sodium bromide,

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