Review Elements, Compounds & Mixtures

Front

What is an element?

Back

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

Front

What is a compound?

Back

Two or more different elements chemically joined together.

Front

What is a mixture?

Back

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

Front

What is a homogeneous mixture?

Back

A mixture that has a uniform composition throughout, such as saltwater.

Front

What is a heterogeneous mixture?

Back

A mixture that has a non-uniform composition, such as a salad.

Front

What is the smallest unit of a compound?

Back

A molecule, which consists of two or more atoms bonded together.

Front

Can elements be broken down into simpler substances?

Back

No, elements cannot be broken down into simpler substances.

Front

What is the difference between a compound and a mixture?

Back

A compound is made of two or more elements chemically bonded, while a mixture is made of substances that are not chemically bonded.

Front

Give an example of a compound.

Back

Water (H2O) is a compound made of hydrogen and oxygen.

Front

Give an example of an element.

Back

Oxygen (O) is an element.