2.5.3 giant covalent structures

Question 1

giant covalent structures

Answer 1

non-metals form giant structures with atoms joined by covalent bond.

Question 2

Diamond

Answer 2

1) has four strong covalent bond
2) has a high melting and boiling point because of its strong covalent bond.
3) does not conduct electricity because there is no free moving electron to carry a electric charge.

Question 3

the properties of graphite

Answer 3

1) has a high melting and boiling point
2) is soft and slippery
3) great conductor of electricity and heat

Question 4

what type of structure is graphite

Answer 4

hexagonal rings

Question 5

why is graphite slippery

Answer 5

the hexagonal rings are in layers. there are no covalent bond between the layers so they slide

Question 6

why can graphite conduct electricity

Answer 6

delocalised electrons can move. this means they can conduct thermal energy and electricity.

Question 7

graphene properties

Answer 7

1) one atom thick
2) good conductor of electricity because of delocalised electrons
3) it has a strong covalent bond

Question 8

fullerenes properties

Answer 8

1) molecules with carbon atom with hollow shape

2) fullerene can be use for pharmaceutical delivery, catalyst and lubricants.

Question 9

carbon nanotubes properties

Answer 9

1) has high tensile strength

2) excellent conductors of heat and electricity