For Q2. (b)(i) The answer should be 1.5*10 atoms and not 1.5*10 atoms.
Am I right in saying that this marking scheme is the exact same one that was sent out to markers when they were marking the papers?
A direct link can be found on this thread: 2004 Official Answers Published
EDIT: My 500th post. Woohoo!
Edited by ally, 14 September 2004 - 12:54 PM.