Elements, Compounds, and Mixtures

What is an element?

• A substance that is composed of only one type of atom.

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

• A substance that can be broken down into simpler substances by physical means.

• A substance that can be broken down into simpler substances by chemical means.

Give an example of an element.

• Water

• nitrogen

• air

• salt

Provide an example of a compound.

• Nitrogen

• Oxygen

• Helium

• Water

What is a mixture?

• A substance that cannot be separated into its constituent parts.

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

• A single substance that is chemically bonded together.

• A combination of two or more substances that are chemically bonded together.

Which one of these is NOT a pure substance?

• Elements

• Mixtures

• Compounds