Which One of the Following Ionic Compounds Has an Incorrect

question 127

Multiple Choice

Which one of the following ionic compounds has an incorrect formula or is not named correctly?

• A)CoO, cobalt oxide
• B)Co₂O₃, cobalt(III) oxide
• C)CoO₂, cobalt(IV) oxide
• D)Cu₂S, copper(I) sulfide
• E)MgS, magnesium sulfide

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