GIANT COVALENT SUBSTANCES

Question 1

what is the melt/boil point of giant covalent substances?

Answer 1

HIGH

Question 2

Explain the melt/boiling point…

Answer 2

1. giant covalent lattice
2. strong covalent bonds only
3. which require lots of energy to break

Question 3

What is a property of diamond.

Answer 3

Hard (hardest naturally occurring material)

Question 4

What is the structure of diamonds?

Answer 4

tetrahedral

Question 5

can diamonds conduct electricity?

Answer 5

NO

Question 6

explain the conductivity of diamond…

Answer 6

no charged particles as they are all in a covalent bond

Question 7

diamond and graphite are ………………. of carbon

Answer 7

allotropes

Question 8

how are the atoms in graphite arranged?

Answer 8

in layers

Question 9

what is the boil/melt point of graphite?

Answer 9

HIGH

Question 10

explain the boil/melt point of graphite

Answer 10

despite the layers being able to slide there are still strong covalent bonds to overcome.

Question 11

can graphite conduct electricity

Answer 11

YES

Question 12

explain the conductivity of graphite.

Answer 12

there are mobile delocalised electrons

Question 13

what is the formula for graphite and diamond?

Answer 13

C

Question 14

how many bonds does each C atom form in diamond?

Answer 14

4

Question 15

how many bonds does each C atom form in graphite?

Answer 15

3