Unit Test: Naming and writing formulas What to study: Review all Bellwork questions. Read chapter 7 section 1, 2, and 3. Read chapter 8 section 1 and 2 Review all key vocabulary and notes. Practice worksheets. Unit Test: 45 multiple choice questions.(135 pts ) Bring a #2 pencil.

Review Chapter 7 and 8 Naming and writing ionic Compounds Naming and writing Transition Metals Lewis Dot Structure Naming Binary Molecular Molecules Naming and writing acids

Naming Binary compounds Al + O Are they equal ? ⁺3 ⁻2 Would they cancel each other out? Al Al O O O  ⁺3 ⁺3 ⁻2 ⁻2 ⁻2 Al₂O₃ Aluminum Oxide

Binary Compounds(contain polyatomic ions) NH₄⁺ + O²⁻  Ammonium and Oxygen NH₄⁺ + NH₄⁺ ------ O²⁻ +2 -2  (NH₄)₂O Ammonium Oxide

Contain Transition Metals Fe³⁺ and O²⁻ Fe³⁺ Fe³⁺ and O²⁻ O²⁻ O²⁻ form Fe₂O₃ iron(III)oxide

Lewis Dot Structure: How many valence electrons? Example: CH₄ Molecule H∙ H∙ H∙ H∙ 4H∙ + 

Bonds

Naming Molecules Prefixes: 1 mono 6 hexa 2 di 7 hepta 3 tri 8 octa 4 tetra 9 nona 5 penta 10 deca

Naming Molecules Practice: P₂O₅ Solve P=Phosphorus 2 O=Oxygen 5 Answer: diphosphorus pentaoxide

Naming acids Example: HCl hydrogen hydro Chlorine  Chloric Answer: Hydrochloric acid Hydro chloric acid H Cl (second word is always acid)

Naming Oxyacids Oxyacids contain hydrogen and oxyanions.  Oxyanions are polyatomic ion that has a oxygen. EX: HNO₃ If it ends in ate ic If it ends ite ous No₃ nitrate (look at table 7.9) ate ic Change nitrate to nitric.  Second word is always acid. EX: HNO₃ Answer: nitric acid

Phosphoric acid Phosphate PO4 3⁻ H⁺ H⁺ H⁺ H3PO4

Key vocabulary for unit test Chemical bond Cation Anion Ionic bond Ionic compound Binary Compounds Transition Metals Lewis Dot Structure Molecules compounds

Monoatomic ion Formula unit Oxidation number Polyatomic ion Oxyanion Covalent bond Oxyacids Binary acids Octet Rule Valence electrons

Single covalent bond Double covalent bond Triple covalent bond

Practice: Name the following chemical compounds: 1) NaBr 2) Ca(C2H3O2)2 3) P2O5 4) Ti(SO4)2 5) FePO4 6) K3N 7) SO2 8) CuOH 9) Zn(NO2)2 10) V2S3

Practice: Write The Formula Write the formulas for the following chemical compounds: 11) silicon dioxide 12) nickel (III) sulfide 13) manganese (II) phosphate 14) silver acetate 15) diboron tetrabromide 16) magnesium sulfate heptahydrate 17) potassium carbonate 18) ammonium oxide 19) tin (IV) selenide