Question

i)why diamond is hardest ?
ii)explain C60 molecules ?
iii)graphite is used as lubricant . why ?
vi)diamond is a bad conductor of electricity.whygraphite is a good conductor of electricity?
v)how to work making pencil?

Answer 1

(i) Diamond is the hardest because the carbon atoms in it are bonded in a strong tetrahedron pattern.
(ii)A fullerene is a molecule of carbon in the form of a hollow sphere.
(iii)Graphite is a mineral made of loosely bonded sheets of carbon atoms, giving it a slippery texture that makes it a very effective lubricant.
(iv)Graphite can conduct electricity because of the free electrons in its structure whereas diamond has no free electrons.