Name each ionic compound containing a polyatomic ion.
Here, we have to name ionic compound that has a polyatomic ion. So, first let’s see what is a polyatomic ion.
An ionic compound is a substance formed from the chemical binding of elements with opposite charges. The force of attraction between opposite charges keeps the molecule together. Simply put, Ionic compounds are generally combinations of metals and nonmetals where cations are metal ions and anions are nonmetal ions.
Example : Common table salt or Sodium chloride(NaCl), Silver iodide(AgI) .
A polyatomic ion is an ion that contains more than one atom, even if the atoms are of the same element.
Example: calcium carbonate consists of the monatomic ion Ca2+ and the polyatomic ion CO32− forming CaCO3.
Let’s see the rules for naming the polyatomic ions :From the formula for the polyatomic ion, find the charge of the metal. If an ionic compound starts with a metal that is not in Group 1 or Group 2, then the name must contain a Roman numeral, as those elements have multiple oxidation states. Write down the name of the metal with the roman numeral indicating the charge of the metal. We can instead add "-ous" to the transition metal name for the lower-charge state, and "-ic" for the higher charge.
Example : Fe2+ becomes "Ferrous" and Fe3+ becomes "Ferric."
(Remember to only use the Roman numeral only when you're writing out the name, not writing the formula).Write the name of the nonmetal ions and suffix with the “-ate” or “ite” depending on the number of oxygen atoms, skipping the last syllable in the name. Combine both the names and we get the name of the ionic compound with polyatomic ions.