Introduction to naming Chemical Compounds

So Far We’ve Learned: Compound are made from ions Formulas start with the cation and end with the anion renamed with “ide” Subscripts determine the number of atoms Polyatomic ions are ions made of many atoms and usually have parenthesis around them

How are compound named? (Type I & II) all metals (cations) use the name from the periodic table all non metal ions (anions) use the name from the periodic table changed to “ide” polyatomics don’t change their name transition metals require roman numerals that match thier charge eg. Fe +2 is Iron (II), Fe +3 is Iron (III)

Transition Metals If the positive ion is a transition metal, the name of the compound MUST include a Roman Numeral! Here’s an example: There are two “iron chlorides”: FeCl 2 is iron (II) chlorideFeCl 3 is iron (III) chloride The Roman Numeral indicates the charge of the metal ion

Type III Non metal and non metal (NO IONS) Use prefixes to tell the number of atoms (see chart) No polyatomics

Acids Always begin with Hydrogen Use a list to name them