![]() In polyatomic ions, polyatomic (meaning two or more atoms) are joined together by covalent bonds. -ic ending is used for the higher oxidation state.-ous ending is used for the lower oxidation state.The metal is changed to end in –ous or –ic. Instead of using Roman numerals, the different ions can also be presented in plain words. Although they belong to the transition metal category, these metals do not have Roman numerals written after their names because these metals only exist in one ion. Educated at Washington and Lee University, as well as Cornell University, he held National Institutes of Health postdoctoral appointments at the University of Manchester Institute for Science and Technology in England and at Indiana University. Several exceptions apply to the Roman numeral assignment: Aluminum, Zinc, and Silver. Kotz is an emeritus State University of New York Distinguished Teaching Professor at the College at Oneonta. The most common ones are shown in the table below: Transition Metal Ion with Roman Numeral Just like the other nomenclature rules, the ion of the transition metal that has the lower charge has the Latin name ending with -ous and the one with the the higher charge has a Latin name ending with -ic. However, some of the transition metals' charges have specific Latin names. Janu History Edit An edition of Chemistry
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