Pure Substances and Mixtures

Front

What is a pure substance?

Back

A pure substance is a material that is made up of only one type of atom (element) or compound.

Front

What are the two types of mixtures?

Back

The two types of mixtures are homogeneous and heterogeneous.

Front

Define a homogeneous mixture.

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, meaning the different components are not distinguishable.

Front

Define a heterogeneous mixture.

Back

A heterogeneous mixture is a mixture where the different components can be seen and are not uniformly distributed.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A compound is a pure substance formed when two or more elements are chemically bonded together.

Front

Give an example of a homogeneous mixture.

Back

An example of a homogeneous mixture is saltwater, where the salt is completely dissolved in water.

Front

Give an example of a heterogeneous mixture.

Back

An example of a heterogeneous mixture is a salad, where the individual ingredients can be seen and separated.

Front

What is the difference between a substance and a mixture?

Back

A substance is a form of matter that has a uniform and definite composition, while a mixture is a combination of two or more substances that retain their individual properties.

Front

What is a suspension?

Back

A suspension is a heterogeneous mixture in which solid particles are dispersed in a liquid but will settle over time.