COVALENT COMPOUNDS

Question 1

What is covalent bonding?

Answer 1

When non-metallic elements share pairs of electrons

Question 2

Can small molecules conduct electricity? Why?

Answer 2

They have no overall electrical charge

Question 3

What are the melting/boiling points of small molecules like?

Answer 3

Low melting/boiling points because they have weak intermolecular forces which are easier to overcome

Question 4

What are small molecules?

Answer 4

They contain a small number of non-metal atoms joined together by covalent bonds.

Question 5

How many covalent bonds in graphite?

Answer 5

3

Question 6

How many bonds in diamond?

Answer 6

4

Question 7

Can diamond conduct electricity?

Answer 7

No

Question 8

Can graphite conduct electricity?

Answer 8

Yes,Graphite has delocalised electrons, just like metals. These electrons are free to move between the layers in graphite

Question 9

What can carbon nanotubes be used for?

Answer 9

Wiring in aeroplanes
Computer components
Lightweight aircraft parts

Question 10

What is a catalyst?

Answer 10

A substance that speeds up a chemical reaction without itself being consumed in the reaction.