2002 - q11,12 can do them now
2002 - 25 i understand that it will be either A or D - the answer is D but why is it not A?
2002 - q29 its a matter of ratios but im not sure how as i got the number of neutrons would be 52 :S
2003 - again i think it is standard grade work - q4 and 5
2003-11 how do we know that it is D?
2003-13 I understand that it has to be covalent but i dont know how you would be able to tell if it was polar or non polar :S
2003-14 not sure at all on this one
any help would be much appreciated
Edited by xClairex, 28 May 2007 - 06:38 PM.