How Do You Name Transition Metals with Polyatomic Ions

Write the name and charge for the non-metal. If you have a polyatomic ion, use the Common Ion Table to find and write the formula and charge. Use the total charge on the non-metal (or polyatomic ion) find the charge on the transition metal.

Are transition metals polyatomic ions?

Unlike other transition metals, the 1+ cation of mercury has the formula Hg22+ and behaves like a polyatomic ion. … Mercury has a 2+ charge, as indicated by the roman numeral, and nitride has a 3- charge. Three mercury ions and two nitride ions are needed to balance the charges between the cation and anion.

What do we do differently when naming transition metals?

Most of the transition metals can form two or more cations with different charges. … In cases like this, the charge of the metal ion is included as a Roman numeral in parentheses immediately following the metal name. These two compounds are then unambiguously named iron(II) chloride and iron(III) chloride, respectively.