Ionic bonding occurs when the following types of elements bond to form a
compound:

A metal & metal
B metal & non-metal
C non-metal & non-metal

When an ionic compound is formed, the metal atoms:

A gain electrons to form negatively charged ions
B lose electrons to form negatively charged ions
C gain electrons to form positively charged ions
D lose electrons to form positively charged ions

Describe the structure of
sodium chloride (NaCl)

Covalent bonding occurs when the following types of elements bond to
form a compound:

A Metal and a metal
B Metal and a non-metal
C non-metal and non-metal

A water molecule (H2O) consists of
2 hydrogen atoms and 1 oxygen atom.
Draw a dot & cross diagram to show the covalent bonding in a water molecule.

The element carbon comes in different forms or ‘allotropes’. These include:

• graphene
• graphite
• carbon nanotubes
• fullerenes
• diamond

What is an allotrope?

What is an alloy?

Malleability describes the property of a substance that can be:

A pulled into wires
B hammered into sheets
C shattered into pieces

Graphene is an allotrope of carbon. Carbon is a non-metal element.

Graphene sheets are about 200 times stronger than steel and also have a much lower density.

Suggest how these properties make graphene useful for manufacturing car parts.

Give one example of a polymer and it's uses.

Fill in the gaps using these words: plastic, elastic, do, do not

If a material goes back to its original shape, it has ______________ behaviour. In this case the particles _____________ go back to their original positions.

If a material does not go back to its original shape, it has _______________ behaviour. Now the particles _____________ go back to their original positions.