bonding -

Question 1

what are polymers

Answer 1

they are longs chains of repeating units

Question 2

what is in a polymer

Answer 2

lots of small units that are linked together to form a long molecule that has repeating sections

Question 3

what are the atoms in a polymer joined by

Answer 3

strong covalent bonds

Question 4

draw a repeating unit for polyethene

Answer 4

look on page 57 of chemistry book

Question 5

how do you find the molecular formula for a polymer
give the molecular formula for polyethene
2 points

Answer 5

1) write down the molecular formula of the repeating unit in brackets and put and n’ outside
2) (C2H4)n

Question 6

what are the intermolecular forces between polymer molecules compared to ones between simple covalent molecules and ionic or giant molecular compounds
2 points

Answer 6

1) they are bigger than ones between simple covalent bonds so the melting point is higher
2) but they are weaker than ionic or covalent bonds so they generally have a lower boiling points than ionic or giant molecular compounds