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Friday, October 12, 2007

Chemistry Questions - Bonding

Here is another one for you to be exposed to:

Q) Which of the following compounds has the largest number of lone pairs of electrons on the central atom?

A) CCl4
B) NH3
C) CO2
D) H2O

Share your thoughts with us.

Rgds
Sean
SimpleChemConcepts

2 comments:

lijun(: said...

D.

if i'm not wrong, lone pair of electrons is the pair of electron that is not shared/bonded with other atoms. (in simple terms)

so, if we draw out the structure and examine the electrons,

A has no lone pair of electrons,
B only have one pair,
C do not have (cos C-0 is double bond),
and D has 2 pairs.

hence, D should be the answer.

Sean Chua said...

Hi Lijun,

Well Done!

You are absolutely spot on!

Cheers
Sean
SimpleChemConcepts
"Learning Experience with A Difference"