Revision of Elements, Compounds and Mixtures

Match the most appropriate description under each diagram

• an element made up of molecules

• 
• a mixture of elements

• 
• an element made up of single atoms

• 
• a compound made up of three atoms

• 
• a mixture of compounds

• 

Compound has a fix proportion of constituents by mass.

• True

• False

Seawater, salt, sugar and air are all compounds.

• True

• False

Constituents in a compound are chemically combined.

• True

• False

Compounds can be separated by physical methods.

• True

• False

A mixture has the same properties as its constituents that makes it up.

• True

• False

The temperature of the surroundings changes when a mixture is formed.

• True

• False

Sodium and chlorine react together to form sodium chloride, also known as table salt. The properties of sodium chloride are different from those of sodium and chlorine.

• True

• False

Salt can be obtained from seawater via evaporation to dryness. 

This method is considered a chemical method.

• True

• False