1. Polyatomic Ions Bonding, writing formule and naming compounds

3. Writing Formulae: ** These ones are a little bit different. You group the hydrogen’s together. ** ** Hydrogen Magnesium Aluminium Potassium Iron II Calcium Iron III Copper II HCO 3 - NO 3 - SO 4 2- OH -

7. When you are working with non-metals like oxygen (O) and chlorine (Cl), the prefix (section at the beginning of the word) of the second element changes based on how many atoms there are in the compound. It's like this Let's start with Carbon monoxide (CO). You have one carbon (C) atom and one oxygen (O) atom (you can also use the prefix MONO to say one atom). Remember that the second word ends in -ide. So... (1) Carbon + (1) Oxygen = Carbon monoxide

9. Now we'll build on that example. What if you have one carbon (C) and two oxygen (O) atoms? (1) Carbon + (2) Oxygen = One last example and we'll call it quits. Now you have one carbon (C) and four chlorine (Cl) atoms. (1) Carbon + (4) Chlorine = Rule 2 When there is more than two elements in the compound, the name usually ends in ate. CaCO3 = Calcium Carbonate Zn(NO3)2 = Zinc Nitrate MgSO4 = _______________________________

10. Naming Compounds Mg 3 (PO 4 ) 2 Fe 2 (SO 4 ) 3 MgBr 2 NaHCO 3 Ca(HCO 3 ) 2 FeCl 2 Al 2 O 3 MgSO 4 AlCl 3 Zn(NO 3 ) 2 KNO 3 Na 2 SO 4 CuO KOH FePO 4 CaBr 2 NaOH FeI 3 ZnS CaCl 2 K 2 O NaI