Comments on: O Level Chemistry: Periodic Table & Group Trends

By: rosa

rosa — Sat, 05 Nov 2011 22:01:02 +0000

thera are 18 groups in the periodic table and 2 elements in period 1

By: FOUZIA

FOUZIA — Sun, 09 Oct 2011 06:55:01 +0000

WHY WE CALL WAX VAPOUR AND NOT// A GASSEOUS VAPOUR

By: sean

sean — Wed, 05 May 2010 15:08:34 +0000

Hi farhan,

Discussions on SimpleChemConcepts.com is based on Basic Chemistry Syllabus (such as GCE-O Levels Chemistry).

For elements that can hold more than 8 electrons in their outermost shell, they belong to Advanced Level Chemistry (such as GCE-A Levels Chemistry). Do visit the new webiste for advanced level chemistry students : http://www.ALevelH2Chemistry.com to find more discussions.

To Your Academic Success in Chemistry,
Sean Chua
Master Trainer & Author

By: sean

sean — Wed, 05 May 2010 15:05:38 +0000

Hi Kim,

The rectangular block of metal elements between Group II and III is known as Transition Metals and NO group number are assigned to them. As such, there should only be 8 Groups in the Periodic Table.

For Quick Check 2, you are absolutely right. Well Done.

To Your Academic Success in Chemistry,
Sean Chua
Master Trainer & Author

By: sean

sean — Wed, 05 May 2010 15:03:03 +0000

Hi Kerk Yan Juin,

Response to your suggested answers.

Quick Check 1:
- Spot on. Answer is indeed D. Well Done!

Quick Check 2:
- Common error! You had fall into the trap set by many examiners and teachers.
- Look again at 1st Period which is the Horizontal Row – there are only H and He there.

As such, answer should be C.

To Your Academic Success in Chemistry,
Sean Chua
Master Trainer & Author