Pure substances and Mixtures

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. It can be an element or a compound.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties. Mixtures can be homogeneous or heterogeneous.

Front

What is an element?

Back

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

Front

What is a compound?

Back

A compound is a pure substance formed when two or more different types of atoms chemically bond together.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition and appearance throughout, such as saltwater.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture that has a non-uniform composition, where the different components can be seen, such as a salad.

Front

How can you identify a pure substance?

Back

A pure substance has a fixed melting point, boiling point, and density, and it cannot be separated into other substances by physical means.

Front

What is the difference between a compound and a mixture?

Back

A compound is made of two or more elements chemically bonded together, while a mixture is a physical combination of substances that can be separated.

Front

Can a mixture be a pure substance?

Back

No, a mixture cannot be a pure substance because it contains two or more different substances.

Front

What happens to the properties of substances in a mixture?

Back

In a mixture, the individual properties of the substances remain unchanged.