• Naming compounds that involve transition metal cations necessitates the use of the Stock system.
  • The Stock system allows the specification of transition metal ionic charge when naming ionic compounds.Roman numerals are used to indicate the amount of positive charge on the cation.
  • The ratio of copper ions to oxide ions determines the name of a compound.
  • For example, copper(I) oxide and copper(II) oxide are different compounds because of the charge of the copper ion.
  • In the third formula, there is one tin ion for every two oxide ions, making the name tin(IV) oxide.
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