Elements, Compounds, & Mixtures

What is the definition of an element?

• A pure substance that cannot be broken down into any simpler substances

• A substance made up of two or more elements chemically joined together.

• Two or more substances which are not joined together chemically.

• A substance that dissolves in a solvent.

Which of the following is an element?

• Oxygen (O)

• Carbon Dioxide (CO2)

• Water (H2O)

• Salt (NaCl)

Which is the following is a compound?

• Nitrogen

• Carbon dioxide

• Aluminium

• Sodium

A compound has different physical properties to the elements that it is formed from.

• True

• False

Glucose (C₆H₁₂O₆) contains atoms of carbon, hydrogen, and oxygen that are chemically bonded together.  What type of matter is glucose?

• Glucose is an element
• Glucose is a compound 
• Glucose is a mixture
• Glucose is a metal

The smallest particle of any element that still has the properties of that element is called

• an atom
• a compound
• a solution
• a mixture

What does the diagram show?

• A mixture of two elements
• A pure compound
• A mixture of two compounds
• A mixture of a compound & element

What does the diagram show?

• A mixture of two elements

• A pure substance - compound

• A mixture of two compounds

• A mixture of a compound & element

What does the diagram show?

• A mixture of two elements
• A pure compound
• A mixture of two compounds
• A mixture of a compound & element

What does the diagram show?

• A mixture of two elements
• A pure compound
• A mixture of two compounds
• A mixture of a compound & element