bonding - covalent - simple and macromolecular molecules

Question 1

what are simple molecules?

Answer 1

made up of small covalent bonds and intermolecular forces between molecules

Question 2

what are two examples of simple moleculea?

Answer 2

ice and iodine

Question 3

what are the three properties of simple molecules?

Answer 3

• low melting points
• cannot conduct electricity
• solubility - some are polar/can form hydrogen bonds - some are not polar

Question 4

What are macromolecular compounds?

Answer 4

giant covalent structures

Question 5

what are examples of MC?

Answer 5

diamond, graphite, silicon dioxide and

Question 6

what are the two allotropes of carbon?

Answer 6

graphite and diamond

Question 7

what are the properties of diamond?

Answer 7

• high melting point - lots of covalent bonds
• insoluble
• hard
• can’t conduct electricity - no free electrons

Question 8

what are the properties of graphite?

Answer 8

• high melting point
• insoluble
• good lubricant - weak IF between layers
• conduct electricity - 4th out electron of every carbon atom is free and delocalised