Elements, Compounds and Mixtures

Which one of the following does not describe a compound?

• elements bonded together

• fixed composition of elements present

• variable composition of elements present

• does not retain properties of individual elements present

Copper is a(n)

• element

• mixture

• compound

Air is a(n)

• element

• mixture

• compound

Carbon Dioxide (CO2), water (H2O), and glucose (C6H12O6) are all

• mixtures

• elements

• compounds

• beverage

ALL of the following are examples of matter EXCEPT

• air

• sunlight

• the sun

• gases

A pure substance that cannot be separated into simpler substances by physical or chemical means.

• element

• compound

• mixture

• non metal

When elements form mixtures, the elements

• keep their original properties.

• react to form a new substance with new properties.

• combine in a specific mass ratio.

• always change their physical state.

How is a compound different from a mixture?

• Compounds have two or more components.

• Each substance in a compound loses its characteristic properties.

• Compounds are commonly found in nature.

• Solids, liquids, and gases can form compounds.

When two or more elements join together chemically,

• a compound is formed.

• a mixture is formed.

• a substance that is the same as the elements is formed.

• the physical properties of the substances remain the same.

Which set of substances below are all mixtures?

• milk, aluminium and wood

• water, gold and blood

• blood, milk and hair cream

• iron, blood and sand

• gold, diamond and carbon