Warm up 10-12-15 Covalent bonds are between _____ and _____ elements Ionic bonds are between _____ and _____ elements Identify if these compounds are ionic or covalent: FeS, CO2, Cl2 and AlBr3

Formulas and Names of Ionic and Covalent Compounds Chp 5-3 and 6-2

Nomenclature: Naming of compounds Must determine which type of bond made up the compound Ionic bond has metal elements Covalent bond has no metal elements

Naming Covalent (Molecular) Compounds 1. Use a prefix to indicate the amount of each element in the compound 2. Never use mono– on the first element name. 3. Give the last element an –ide ending.

Naming Covalent (Molecular) Compounds Mono– 1 Di– 2 Tri– 3 Tetra– 4 Penta– 5 Hexa– 6 Hepta– 7 Octa– 8 Nona– 9 Deca– 10 Prefixes

Examples CO2 B2H4 Dinitrogen trioxide

Naming Covalent Compounds Practice Chemical Formula Name 1. CO 2. P2S5 3. SiO2 4. SCl4 5. Trinitrogen pentabromide 6. Dinitrogen trioxide Why incorrect? Monosulfur dioxide Carbon Monoxide, diphosphorus pentasulfide, Silicon dioxide, sulfur tetrachloride, N3Cl5,

Naming Ionic Compounds 1. Ending element change to –ide. (no prefixes) 2. Make sure all the charge cancel each other out 3. If there is a transition metal you indicate the charge with a roman numeral after the name of the metal. 4. If it is a polyatomic ion, you simply use the name as it is. (no –ide)

Examples CaCl2 MgI2 Potassium Sulfide Beryllium Fluoride Iron (II) Nitride FeCl2

Naming Ionic Compounds Practice Writing Chemical Formula for Ionic Compounds -Write the symbol and charge -Cation goes in front -Make sure all the charges Cancel each other out ______________ AlCl3 ______________ Na2S Lithium Bromide _____ Calcium Fluoride _____ Aluminum Oxide _____ ____________ CuCl2 Iron (III) Phosphide ____ 1. Aluminum Chloride 2.Sodium sulfide 3.LiBr 4.CaF2 5.Al2O3 6.Copper (II) Chloride 7. FeP Transition metal

Naming Ionic Compounds - Polyatomic Ions (NH4)+ Ammonium (NH3) Ammonia (OH)- Hydroxide (CO3)-2 Carbonate (NO3)- Nitrate (NO2)- Nitrite (SO4)-2 Sulfate (SO3)-2 Sulfite (PO4 )-3 Phosphate (PO3)-3 Phosphite (Cr2O7)-2 Dichromate

Naming Polyatomic Ions ______________ Li2SO4 ______________ Sr(NO3)2 Potassium Phosphate _____ Ammonium Oxide _____ ______________ NaOH ______________ Ca(NO2)2 Calcium Carbonate ______ Ammonium Sulfide _____ Lithium Sulfate, Strontium Nitrate, K2CO3, (NH4)2O, Sodium Hydroxide, Calcium Nitrite, CaCO3, (NH4)2S http://chemsite.lsrhs.net/FlashMedia/html/compoundsAll.html Practice naming online

More Examples Mixture of covalent, ionic and polyatomic nomenclature.

SrS Strontium Sulfide

GaCl3 Gallium Chloride

Calcium Oxide CaO

Sulfate SO42-

Phosphate PO43-

Strontium Nitride Sr3N2

Li3N Lithium Nitride

Hydroxide OH-

Beryllium Carbonate BeCO3

BeSe Beryllium Selenide

Mg(NO3)2 Magnesium Nitrate

KBr Potassium Bromide

AlPO4 Aluminum Phosphate

Magnesium Arsenide Mg3As2

NaOH Sodium Hydroxide

Potassium Sulfate K2SO4

Ba2P3 Barium Phosphide

Rubidium Phosphide Rb3P

Potassium Chloride KCl

Sodium Oxide Na2O

Rb2O Rubidium Oxide