Pure Substances and Mixtures

__________________ is the name given to a pure substance containing only one type of atom.

• Element

• Compound

• Molecule

• Mixture

Air is a(an) ______________ of many gases that are odourless and colourless.

• Compound

• Element

• Mixture

• Atom

What is another term for an homogeneous mixture?

• Element

• Solution

• Compound

• Pure substance

Which of the following is a homogeneous mixture?

• Sandy water

• Silver

• Ice cubes in orange juice

• Vinegar

Which of the following is a heterogeneous mixture?

• Soil

• Steel

• Air

• Vinegar

Which of the following statements is false about mixtures?

• Mixtures can be liquids, gases, and solids.

• A mixture has a fixed chemical composition.

• The substances retain their identities in a mixture.

• Mixture can be separated into simpler substances by physical process.

Which of the following is a compound?

• Air

• Salt water

• Water

• Aluminium foil

Which of the following statements is false?

• Matter is anything that has mass and takes up space.

• Elements cannot be chemically broken down into simpler substances

• All pure substances are elements.

• Elements are composed of atoms.

Which of the following is not an element?

• Gold

• Copper

• Oxygen

• Table salt

_____________________ is the name given to a mixture in which the composition is uniform throughout the mixture.

• Element

• Compound

• Heterogenous

• Homogenous