comments on 3 answers

Hi Mr Tan, I have given some comments of other people's answer (in my blog?) as told. So people, please pardon me for any negative comments...Thx.

1) First of all, for Wan Ling (16)'s answer, I think that her answer was clear and accurate. She also includes some diagrams to add on to her explaination. This is what I think we should all learnt from. I guess one mistake that I find is that the relative mass of electrons should be 1/1840 (according to the textbook). Also, for the diagram for sulfur ion, the 2- should be outside the bracket. To conclude, her answer was nice and quite accurate with few mistakes.

2) Secondly, for Su (24)'s answer, she has very detailed and great answer. She also included some examples in her answer. I think we should learnt from it. For the first question, I was quite amezed at the length of the answer and the details. I have learnt from her answers. However, for the question 5, I think she can add on with the physical properties. Also, for the sulfur ion, there should be a 2- outside bracket. To conclude, I liked her answers as it is nice and interesting.

3) Lastly, for Aleen (27)'s answer, her answer are very details with pictures and easy to understand. She also answered the questions very well. Her drawings are also very clear and neat. But I think she write wrongly for the sodium ion, it should be Na not S and outside the brackets of sodium ion should be + not 1+. In conclusion, she had done a great work with detailed explaination and clear answers.