Monday, April 27, 2009

ask anything here

as requested by Jessel... u guys can ask anything u guys want here..

Monday, April 13, 2009

Paper 2

Hi all,
Here is some information on paper 2 = 100marks = 50%
This is the part where questions can be quite challenging because structure questions are often mixed with higher order thinking questions. The good news is, since its only on 4 topics.. it's not very difficult... U can do it!!!
Section A:
Structure 1 to 6 = 10marks X 6 = 60marks
(two questions from chapter 2, two from chapter 3, one from chapter 4 &
two from chp5)
To score an A, its advisable to get about 6marks from each questions....
[36marks = 18%]
To pass? U need at least 4marks from each questions....[24marks = 12%]
Section B:
Two essay questions... (Chapter 2 & 3)...choose ONE only...[20 marks = 10%]
try to get at least 10 marks...[5%]
Section C:
Two essay questions as well...(Chapter 4 & 5)... choose ONE only...
.... a total of [40 marks = 20%] will be needed to pass....
.... a total of [66 marks = 33%] for those who wants to score...

Wednesday, April 8, 2009


3 questions = 50marks = 25%
question number 1 and 2 is usually related to reading an apparatus reading, variables or graph, practically will be only about experiments... so read up on all the possible experiments from now on...
List of Experiments:
1. Heating and cooling of napthalene
2. Determining emperical formula for Magnesium oxide (reactive metals)
3. Determining emperical formula for copper oxide (less reactive metals)
4. Group 1 - reaction with Chlorine..Oxygen..Water..
5. Group 17
6. Period 3
(a few simple experiments from chapter 5)
You can discuss anything here regarding those experiments... pls share info here..

Ionic Bonds

What is an ionic bond?
An ionic bond is the force of attraction between the opposite charges of an ion. One element in an ionic bond loses electrons, and another element must gain the electrons. Some atoms lose electrons to make the outside energy levels become more stable. Atoms become more stable when their outer most energy level has 8 electrons. Pure ionic compounds usually are crystalline solids, liquids, or gases.


1.Ionic bonding occurs when ions of ________ carge are attracted to one another.
A. opposite B. positive C. negative D. equal

2.Which substance is an Ionic bond?
A. CO B. CaCl2 C. CO2 D. Al

May Examination Paper 1

50 objective questions = 50marks = 25%

I've set the questions for you.

12 questions from chapter 2: mostly about nucleon no, proton no, nuetron no, electron configuration, heating and cooling of napthalene...

13 from chapter 3: lots of calculations, be ready in term of how to calculate the number of particles, number of molecules, moles, empirical formula, molecular formula...

12 from chapter 4: quite easy except for the equations... watch out for it!!

and 13 from chapter 5: hehe, here, its all about compounds, both ionic and covalent compound.. quite easy!