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1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different elements in the compound Chemical Formula Chemical Formula

1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

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Page 1: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

1. Each element has a different symbol2. The formula for a compound shows the

elements in the compound 3. It also shows the ratio of the atoms of

different elements in the compound

Chemical FormulaChemical FormulaChemical FormulaChemical Formula

Chemical Formula

Page 2: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

The Periodic TableThe Periodic TableThe Periodic TableThe Periodic Table

The Periodic Table

Page 3: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

Chemical FormulaChemical FormulaChemical FormulaChemical Formula

Chemical Formula

Page 4: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

Atomic StructureAtomic StructureAtomic StructureAtomic Structure

Atomic Structure

Page 5: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

Electron shellsElectron shellsElectron shellsElectron shells

Electron shells

Page 6: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

Electron shellsElectron shellsElectron shellsElectron shells

Electron shells

Page 7: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

1. Word equations use the names of the reactants and products to describe a reaction

Word equationsWord equationsWord equationsWord equations

Word equations

Page 8: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

Word equationsWord equationsWord equationsWord equations

Word equations

Page 9: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

1. Chemical equations use the chemical formulae of the reactants and products to describe a reaction

2. The total mass of the product(s) of a chemical reaction must equal the total mass of the reactant(s)

3. Therefore chemical equations must be balanced

4. The total number of atoms of one element should be the same on both sides of the equation

Chemical equationsChemical equationsChemical equationsChemical equations

Chemical equations

Page 10: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

Balancing equationsBalancing equationsBalancing equationsBalancing equations

Balancing equations

Page 11: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

1. Atoms of different elements have different masses

2. The relative atomic mass (Ar) is the mass of the elements compared to the mass of a hydrogen atom

Relative atomic massesRelative atomic massesRelative atomic massesRelative atomic masses

Relative atomic masses

Page 12: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

Relative atomic massRelative atomic massRelative atomic massRelative atomic mass

Relative atomic masses

Page 13: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

1. The relative formula mass (Mr) is the relative mass of a molecule compared to the mass of a hydrogen atom

Relative Formula MassRelative Formula MassRelative Formula MassRelative Formula Mass

Relative formula mass

Page 14: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

Relative formula massRelative formula massRelative formula massRelative formula mass

Relative formula mass

Page 15: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

1. The unknown mass of a reactant or product can be worked out by using the known masses of the other reactants and products

Equation calculationsEquation calculationsEquation calculationsEquation calculations

Equation calculations

Page 16: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

Calculations from EquationsCalculations from EquationsCalculations from EquationsCalculations from Equations

Calculations from equations

Page 17: 1.Each element has a different symbol 2.The formula for a compound shows the elements in the compound 3.It also shows the ratio of the atoms of different

Calculations from EquationsCalculations from EquationsCalculations from EquationsCalculations from Equations

Calculations from equations