What type of bonding involves sharing electrons?

• Ionic

• Covalent

• Metallic

What kind of bonding and structure tends to be associated with low melting points and boiling points?

• Simple molecular covalent

• giant ionic lattice

• giant molecular covalent

• metallic

Which kind of bonding and structure allows substances to conduct electricity when solid?

• Metallic

• Covalent

• Ionic

What happens in terms of subatomic particles when ionic bonds are formed?

• loss and gain of electrons

• shared pair of electrons

• a sea of delocalised electrons

Why does sodium chloride conduct electricity when molten but not when solid?

• molten ions can move freely

• they're too cold when they're solid

• they have too much energy

Name a substance that has a very high melting point and is a non-conductor of electricity in any state.

• Diamond

• Graphite

• Graphene

• Buckminsterfullerene

Why do lattice structures usually have high melting points?

• Lots of energy is needed to break so many (strong) bonds.

• Lots of energy is needed to break so many (weak) bonds

Why does sodium metal conduct electricity?

• It contains a sea of delocalised electrons that can carry a current

• It can easily move ions around a circuit

• metals conduct electricity

Name two types of bonding model.

• Dot and cross, structural formula

• noughts and crosses, snakes and ladders

• chemical formula, plastic models

Name a type of bonding model that is used to show what happens to the electrons in a covalent bond.

• dot and cross

• molecular formula

• 3D ball and stick