| http://www.w3.org/ns/prov#value | - ion oxidation number ??? ??? ??? a polyatomic ion composed of an element, usually a nonmetal, bonded to one or more oxygen atoms oxyanion ??? ??? ??? an ion made up of two or more atoms bonded together that acts as a single unit with a net charge polyatomic ion ??? ??? ??? a mixture of elements that has metallic properties; most commonly forms when the elements are either similar in size or the at
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