Pure Substances and Mixtures

Front

What is a pure substance?

Back

A material that has a constant composition and cannot be separated into simpler substances by physical means.

Front

What is a mixture?

Back

A combination of two or more substances that are not chemically combined.

Front

What is a heterogeneous mixture?

Back

A mixture in which the components are not uniform and can be easily distinguished.

Front

What is a homogeneous mixture?

Back

A mixture in which the components are uniformly distributed and cannot be easily distinguished.

Front

Give an example of a heterogeneous mixture.

Back

Chicken noodle soup.

Front

Give an example of a homogeneous mixture.

Back

Coffee.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical or physical means.

Front

What is a compound?

Back

A substance formed when two or more elements are chemically bonded together.

Front

What is the difference between a pure substance and a mixture?

Back

A pure substance has a uniform and definite composition, while a mixture contains two or more substances that retain their individual properties.

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.