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Unformatted text preview: Aluminum ion If an element can form more than one positive ion, the positive charge of the ion is indicated by a Roman numeral in parentheses following the name of the metal: Fe 2+ iron(II) ion Fe 3+ iron(III) ion Cu + copper(I) ion Cu 2+ copper(II) ion Iron and copper are examples of transition metals . They occur in the block of elements from IIIB to IIB of the periodic table. The transition metals often form two or more different monoatomic cations . click on picture for larger image An older nomenclature for distinguishing between the different ions of a metal is to use the suffixes -ous and -ic . The suffix -ic will indicate the ion of higher ionic charge: Fe 2+ ferr ous ion Fe 3+ ferr ic ion Cu + cupr ous ion Cu 2+ cupr ic ion Note that the different ions of the same element often have quite different chemical properties (again, pointing to the importance of electrons in determining chemical reactivity)....
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- Fall '10