Elements, Compounds and Mixtures

Front

What is the definition of an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together in a fixed ratio.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded and can be separated by physical means.

Front

What distinguishes a homogeneous mixture from a heterogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout, while a heterogeneous mixture has a non-uniform composition with distinct, separate components.

Front

Give an example of a homogeneous mixture.

Back

Salt dissolved in water is an example of a homogeneous mixture.

Front

Give an example of a heterogeneous mixture.

Back

Lucky Charms cereal is an example of a heterogeneous mixture.

Front

What is the definition of a solution?

Back

A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent).

Front

What is a solvent?

Back

A solvent is the substance in a solution that dissolves the solute, usually present in the largest amount.

Front

What is a solute?

Back

A solute is the substance that is dissolved in a solution, usually present in a smaller amount compared to the solvent.

Front

What is the significance of the particle size in mixtures?

Back

The particle size determines whether a mixture is homogeneous or heterogeneous; smaller particles lead to a homogeneous mixture, while larger particles create a heterogeneous mixture.