1. The element carbon can occur in many forms, both
('found in nature') and
(synthesised).
2a. Carbon in the form of diamond is a very
high melting
structure in which millions of atoms are all linked together by
.
2b. It does
because there are no
in its molecular structure.
3a. The most common form of carbon is
, which, although high melting, its crystals are
and slippery.
3b. This is because the
of carbon atoms can slide over easily because they are only held together by
.
3c. This form of carbon
because
can move through the layers of carbon atoms.
3d. These two properties enable
to be used as
in dynamos and electric motors.
4a. There is a
form of carbon collectively called
.
4b. These carbon molecules may prove useful
to speed up chemical reactions or a means of delivering drugs because they can
cell walls.
5a. Carbon can be formed into
called
. which are only a few atoms in circumference.
5b. They are used to form
materials mixed with to produce a
with the right
to suit a particular need
e.g. extreme sports equipment.