For which types of elements do we sometimes use the "ous/ic" system in naming ions?

Name: For which types of elements do we sometimes use the "ous/ic" system in naming ions?
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We sometimes use the "ous/ic" system in naming ions of transition metals. This system involves using the suffix "-ous" for the lower ionic charge and "-ic" for the higher ionic charge. For example, Fe2+ is named ferrous ion and Fe3+ is named ferric ion.

For Which Types of Elements Do We Sometimes Use the "Ous/ic