Some transition metals form more than one type of ion.

Question

Some transition metals form more than one type of ion.

How are these ions distinguished from one another in writing formulas for compounds?

using Arabic numerals

using numerical superscripts

using Latin prefixes

using Roman numerals

Answer 1

using Roman numerals

In writing formulas for compounds containing transition metals that can form multiple ions, the charge of the ion is indicated using Roman numerals in parentheses after the metal's name. This allows the reader to distinguish between the different ions of the same metal.