C3 Structure and Bonding Practice

How is an ion formed?

• An ion is made when two or more types of atom are chemically bonded together.

• When an atom loses or gains electrons to get a full outer shell.

• An atom that shares electrons.

• The nucleus loses or gains electrons.

Which type of substances are the only substances to have intermolecular forces?

• Simple molecular

• Giant Covalent

• Ionic

• Metals

Why do metals have high melting points?

• The metallic bonds are strong.

• They have weak intermolecular forces.

• They have strong attractions between electrons.

• The shared pairs of electrons keep things high.

Why can metals conduct electricity?

• They have free moving layers of ions.

• The layers of ions can slide over each other.

• Delocalised electrons carry charge.

• Ions are free to move and carry charge.

Which of these best describes metallic bonding?

• Closely packed electrons in a sea of ions which move randomly and carry charge.

• Shared pairs of electrons surrounding layers of metal atoms.

• Layers of positive ions in a sea of delocalised electrons.

• Electrostatic attractions between positive ions.

Can fullerenes conduct electricity?

• Yes

• No

• Maybe

Fullerenes are shaped like what?

• Tennis net

• Rugby goal

• Cricket bat

• Football

What shape is the structure of graphene based on?

• Octagon

• Hexagon

• Circle

• Square

Why do simple molecular substances not conduct electricity?

• They have no delocalised electrons.

• They have weak intermolecular forces.

• They have no charged particles to carry the current.

• The ions are tightly packed and cannot move.

Why do simple molecular substances have low melting points and boiling points?

• Weak intermolecular forces are easy to overcome.

• Strong bonds are easy to break at low temperature.

• The molecules are small.

• Simple molecular substances have high melting points.