Covalent Bonds

A covalent bond normally forms between:

    1.  a nonmetal and a nonmetal

    2.  a nonmetal and a metalloid

    3.  a metalloid and a metalloid


In polyatomic ions that contain metals and in a few other instances, covalent bonds can form between metals and nonmetals.  However, a binary compound containing a metal and and a nonmetal is always ionic.

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Kurt M. Wicks

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