Warm up 10-12-15

1. Covalent bonds are between _____ and _____ elements

2. Ionic bonds are between _____ and _____ elements

3. 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 compound2. 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 CompoundsPractice

Chemical Formula Name1. CO2. P2S5

3. SiO2

4. SCl4

5. Trinitrogen pentabromide6. Dinitrogen trioxideWhy incorrect? Monosulfur dioxide

Naming Ionic Compounds1. Ending element change to –ide. (no prefixes)2. Make sure all the charge cancel each other out3. 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

1. CaCl2

2. MgI2

3. Potassium Sulfide4. Beryllium Fluoride5. Iron (II) Nitride6. FeCl2

Naming Ionic CompoundsPractice

1. ______________ AlCl3

2. ______________ Na2S

3. Lithium Bromide _____4. Calcium Fluoride _____5. Aluminum Oxide _____6. ____________ CuCl2

7. Iron (III) Phosphide ____

Writing ChemicalFormula for Ionic Compounds-Write the symbol and charge-Cation goes in front-Make sure all the chargesCancel each other out

Transitionmetal

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

1. ______________ Li2SO4

2. ______________ Sr(NO3)2

3. Potassium Phosphate _____4. Ammonium Oxide _____5. ______________ NaOH6. ______________ Ca(NO2)2

7. Calcium Carbonate ______8. Ammonium Sulfide _____

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