Paper 1

Question 1

Fullerenes

Answer 1

Fullerenes are molecules of carbon atoms with hollow shapes. The structures
are based on hexagonal rings of carbon atoms but they may also contain rings with five or
seven carbon atoms.

Question 2

Graphene

Answer 2

A single layer of graphite with properties that make it useful in electronics and
composites.

Question 3

Graphite

Answer 3

A giant covalent structure which is made up of carbon atoms each of which form
three covalent bonds with three other carbon atoms, forming layers of hexagonal rings which
have no covalent bonds between the layers.

Question 4

Ionic bond:

Answer 4

A metal atom loses electron(s) to form a positively charged ion and a non-metal
gains these electron(s) to form a negatively charged ion. An ionic bond is formed between
the oppositely charged ions.

Question 5

Ionic compound

Answer 5

Chemical compound formed of ions, held together by strong electrostatic
forces.

Question 6

Intermolecular forces:

Answer 6

The forces which exist between molecules. The strength of the
intermolecular forces impact physical properties like boiling/melting point.

Question 7

Polymers

Answer 7

Large long-chain molecules made up of lots of small monomers joined together
by covalent bonds

Question 8

alloy

Answer 8

a mixture of 2 or more elements out of which atleast one is a metal