Completion

1)Transition Metals
2)Stock
3)

Many of the ___1____ have more one common ionic charge. These ions are named using either the ___2____ system or the __3____ naming system.

3. IUPAC

Many of the transition metals have more than one common ionic charge. These ions are named using either the Stock system or the IUPAC naming system.

To find the answer to the question about IUPAC, one can search for information on the naming systems for transition metal ions. One can start by searching for "naming system for transition metal ions," which will lead to various sources explaining the Stock and IUPAC systems. Specifically, for the IUPAC naming system, one can search for "IUPAC naming for transition metals," "IUPAC nomenclature for transition metal ions," or similar terms. This will provide information on how transition metal ions are named using the IUPAC system.