Pure Substances and Mixtures

Front

What is a pure substance?

Back

A pure substance is matter that is always made up of the same combination of atoms. Examples include elements and compounds.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded. Mixtures can be homogeneous or heterogeneous.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. Example: Water (H2O).

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include Iron (Fe) and Oxygen (O).

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout. Example: Steel.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture that does not have a uniform composition and the different components can be seen. Example: Soil.

Front

Is table salt (NaCl) a compound or an element?

Back

Table salt (NaCl) is a compound.

Front

Is steel a homogeneous or heterogeneous mixture?

Back

Steel is a homogeneous mixture.

Front

Which of the following is an example of a compound? Iron, Water, Bronze, Steel?

Back

Water is an example of a compound.

Front

Can elements and compounds both be considered pure substances?

Back

True, both elements and compounds are considered pure substances.