8C2 - structure and bonding quiz

A metal is a type of:

• Gas

• Liquid

• Solid

• Plasma

What type of bonding occurs in metals?

• Ionic bonding

• Covalent bonding

• Metallic bonding

• Hydrogen bonding

Metals are good conductors of electricity because:

• they have free electrons that can move easily.

• they are shiny and reflect light.

• they are hard and durable.

• they have a high melting point.

Malleable means:

• Flexible

• Rigid

• Transparent

• Opaque

Give an example of a simple covalent molecule.

• Water (H2O)

• Sodium chloride (NaCl)

• Magnesium oxide (MgO)

• Calcium carbonate (CaCO3)

What are the properties of simple covalent molecules?

• They have high melting and boiling points.

• They conduct electricity when dissolved in water.

• They have low melting and boiling points and do not conduct electricity.

• They are always soluble in water.

Polymers are good insulators because:

• they have free electrons that conduct electricity.

• they have tightly bound electrons that do not conduct electricity.

• they are made of metal atoms.

• they allow easy flow of electric current.

Diamond is a form of which element?

• Carbon

• Oxygen

• Hydrogen

• Nitrogen

Diamond is hard because:

• it has a unique crystal structure

• it is made of heavy elements

• it is formed under high pressure

• it is a rare mineral

Give an example of a composite material.

• Wood

• Concrete

• Steel

• Aluminum