Halo,

Have you heard of anyone who said Chemistry are boring subjects? You should not be one of them if you are seeing this post. I certainly disagree with that statement and have been relating to others between Chemistry Theories with Real Life examples and applications in order to convince them – the Chemsitry is so fun. Even with all these being done, i still have people coming to me and tell me that Chemistry is boring since there is no movies or songs that revolves around them.

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Question from a Top School 2007 O Level Chemistry Prelim Paper:

Question:

Astatine is a Group VII element below Iodine in Periodic Table. Which of the following statements concerning Astatine is correct?

A) It is a liquid at room temp and pressure.
B) It is a stronger oxidizing agent than iodine
C) It reacts with sodium ti form an ionic compound
D) Its diatomic molecules are held together by weak covalent bonds

Should be a mangeable question. Enjoy doing!

PS: Leave your suggested answers in the “Comments” section below.

Rgds
Sean
SimpleChemConcepts
Learning Experience with A Difference

Halo Students,

Chemistry Practical is round the corner and Chemistry Paper 2 in less than 3 week time.
Hope your preparation is going well.

Since this is the weekend, i think you might want some more conceptual chemistry questions to think it through. Here is the start of more to share:

Question:
Calcium Carbonate decomposes more readily on heating than sodium carbonate. Suggest a reason for this.

CaCO3 –> CaO + CO2
Na2CO3 –> Na2O + CO2

Think about it.

PS: Leave your suggested answers in the “Comments” section below.

Rgds
Sean
SimpleChemConcepts
“Learning Experience with A Difference”