What is an element?

• A material containing only one atom

• A material containing only one type of atom

• A material contain only two types of atoms

• A material containing no atoms

What is a compound?

• A material containing only one atom

• A material containing only one type of atom

• A material containing more than one type of atom bonded together

• A material containing more than one type of atom not bonded together

What is a mixture?

• A material containing only one atom

• A material containing only one type of atom

• A material containing more than one type of atom bonded together

• A material containing more than one type of atom not bonded together

Which of the following would NOT be classed as a pure chemical?

• Element

• Compound

• Mixture

• Molecule

Which of the following is NOT a mixture?

• Sea water

• Air

• Soil

• Diamond

Which of the following is NOT an element?

• Water

• Iron

• Oxygen

• Bromine

Which of the following is NOT true?

• Mixtures retain the properties of both the chemicals that make them up

• Mixtures can be easily separated

• Compounds have properties different to the chemicals that make them up

• Compounds can be easily separated

Which of the following is true?

• Pure water has a sharp boiling point

• Pure water has a higher boiling point than salt water

• Salt water has a sharp boiling point

• Pure water has a lower melting point than salt water

Which of the following can be pure substances?

• Atoms

• Molecules

• Giant structures

• All of the above

Which of the following CANNOT be impure substances?

• Atoms

• Molecules

• Giant structures

• All of the above