Level 7 Chemistry Pre-Test

What is an element?

• A substance made of two or more types of atoms chemically bonded.

• A pure substance made of only one type of atom.

• A mixture of different substances.

• A solution of two or more compounds.

Which of the following is a property of metals?

• Brittle

• Poor conductor of electricity

• Malleable

• Low melting point

What type of bond is formed when atoms share electrons?

• Ionic bond

• Covalent bond

• Metallic bond

• Hydrogen bond

Which of the following is a compound?

• Gold (Au)

• Helium (He)

What is a homogeneous mixture?

• A mixture with visibly different parts.

• A mixture with uniform composition throughout.

• A mixture of metals.

• A mixture that can be separated by filtration.

Which technique is used to separate a soluble solid from a liquid?

• Filtration

• Evaporation

• Decantation

• Magnetic separation

What is the particle model of matter?

• A model that describes matter as being made up of large, visible particles.

• A model that describes matter as being made up of tiny, invisible particles.

• A model that describes matter as being continuous and unbroken.

• A model that describes matter as being made up of waves.

Which of the following is a property of a solution?

• It is always coloured.

• It is a heterogeneous mixture.

• It has a uniform composition.

• It can be separated by filtration.

What is the main difference between a compound and a mixture?

• Compounds are made of one type of atom, mixtures are not.

• Compounds can be separated by physical means, mixtures cannot.

• Compounds have a fixed composition, mixtures do not.

• Compounds are always liquids, mixtures are always solids.

Which of the following is an example of a suspension?

• Salt water

• Muddy water

• Sugar solution

• Air