22.3 – Writing formulas for Ionic Compounds with Polyatomics Part B Focus on what is in PINK

Objectives Write formulas for ionic compounds

Writing Ionic Formulas w/ Polyatomics Watch the Tyler DeWitt Video and complete the viewing guide, you will add it to your notes on this chapter Youtube video

Polyatomic Ions Groups of atoms that stay together and have a charge A positively or negatively charged, covalently bonded group of atoms Polyatomic ions as a whole contains two or more elements

YOU NEVER CHANGE THE FORMULA OF THE POLYATOMIC Polyatomic Formulas When writing out the formula for polyatomics, treat the polyatomic as a whole and place () around the symbol Then place any subscripts outside of the () because the subscript applies to the entire polyatomic YOU NEVER CHANGE THE FORMULA OF THE POLYATOMIC

Name Symbol ammonium NH4+1 acetate C2H3O2-1 chlorate ClO3-1 chlorite ClO2-1 cyanide CN-1 hydroxide OH-1 nitrate NO3-1 carbonate CO3-2 sulfate SO4-2 phosphate PO4-3

Write the formulas for these Lithium sulfide Tin (II) oxide Tin (IV) oxide Magnesium fluoride Copper (II) sulfate Iron (III) phosphide Gallium nitrate Iron (III) sulfide Barium nitrate

In-Class Assignment/Homework PS 22.3 A WKT 2 - Criss Cross practice