Which diagram shows an alloy?

• A

• B

• C

• D

Copper is sometimes used to make cooking utensils and pans. Three properties of copper are shown below:

1, Good conductor of electricity.

2, Corrosion resistant.

3, Good conductor of heat.

Which of these properties make it good for making cooking utensils?

• 1 and 3

• 1 only

• 2 and 3

• 2 only

Most of the elements on the Periodic Table are metals. Metals can be distinguished from non-metals by differences in their physical properties.

Which row correctly describes a metal?

• A

• B

• C

• D

Why are alloys harder than the pure metals from which they are made?

• There are stronger bonds between the atoms

• The atoms are all the same size

• The layers of atoms are distorted

• The properties of each element have combined

A sample of element Y is shiny and can be shaped by hammering.

Which row of the table corresponds to the properties of element Y?

• A

• B

• C

• D

The table shows some properties of four metals

Which of the four metals would be the most suitable for aircraft construction?

• A

• B

• C

• D

Which statement explains why alloys are tougher than pure metals?

• The irregular sizes of the atoms distorts the regular arrangement in the metal structure, meaning more force is required to bend the metal

• The irregular sizes of the atoms distorts the regular arrangement in the metal structure as the bonding is disrupted when the atoms are added

• The regular sizes of the atoms distorts the irregular arrangement in the metal structure, meaning more force is required to bend the metal

• A mixture of metals is tougher than a pure metal because a mixture has more intermolecular forces than a pure metal.

Which of these elements is a metal?

• A

• B

• C

• D

The diagram shows the experimental set-up a student used to investigate the composition of air. The student left the apparatus in the laboratory and observed that the water level had risen inside the test tube after one week.

Which statement explains why the water level rose?

• Nitrogen monoxide was produced.

• Iron oxide was produced.

• The temperature of the water increased.

• Sulfur dioxide was produced.

A student observed the reaction between copper(II) sulfate solution and zinc.

Which observations are correct for this reaction?

• A

• B

• C

• D