Element, Compound and Mixture

What is the definition of an element?

• A pure substance that cannot be broken down into any simpler substances by chemical methods.

• 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

• Carbon Dioxide

• Water

• Salt

Identify the correct chemical symbol for the element Iron

• FE

• Fe

• Ir

• I

Identify the correct chemical symbol of Barium.

• Ba

• B

• ba

• Na

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

The different elements in a compound are joined together in fixed proportion by mass.

• True

• False

A compound can be separated into smaller substances using physical methods.

• True

• False

Which of the following is NOT a difference between a solution and a suspension?

• A solution is clear, while a suspension is cloudy.

• When left to stand for a while, a solution has particles settling to the bottom, while a suspension does not.

• A solution cannot be separated by physical methods, while a suspension cannot be separated by using a filtration method.

• Solid particles dissolve completely in a solution, while solid particles do not dissolve at all in a suspension.

Which of the following is NOT a suspension?

• Orange Juice

• Milk

• Salt Solution

• Tea