Pure Substances and Mixtures Flashcard

Front

What is a pure substance?

Back

A pure substance is a material that contains only one type of molecule.

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 molecule?

Back

A molecule is formed when two or more atoms bond together.

Front

What is a compound?

Back

A compound is a substance made of two or more different types of atoms bonded together.

Front

What distinguishes a homogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout, meaning its components are evenly distributed.

Front

What is an example of a homogeneous mixture?

Back

Steel is an example of a homogeneous mixture, as it consists of a mixture of compounds that are spread evenly throughout.

Front

What is the difference between a molecule and a compound?

Back

The difference is that a molecule can consist of the same type of atoms, while a compound must consist of different types of atoms.

Front

Can a pure substance be a compound?

Back

Yes, a pure substance can be a compound if it is made of two or more different types of atoms.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is one where the components are not evenly distributed, and different parts can be seen.

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.