nomenclature number 1

In the nomenclature section we learned about the 3 different types of  poly atomic ions. Type 1 which is a Binary compound is where a cation and anion join together and form a bond. Type 2 is where two nonmetals join together and form a bond. You must use roman numerals to name them. The last type is Type 3 in which multiple metals and nonmetals join together to form a bond. Some have special names which must be memorized.