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# Simple molecular bonding watch

1. Hi,
You're all probably going to judge and be like, "you thick person", but for my exam, I need to make sure I master drawing covalent bonds, where electrons are shared or something? My teacher is very brief and panic-y, and we barely even looked at this. I don't know what it is I don't fully understand, but it's quite confusing in general I think. Here's a picture of the diagram in my revision guide, in-case my describing made no sense :P

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2. (Original post by 3mma_gal96)
Hi,
You're all probably going to judge and be like, "you thick person", but for my exam, I need to make sure I master drawing covalent bonds, where electrons are shared or something? My teacher is very brief and panic-y, and we barely even looked at this. I don't know what it is I don't fully understand, but it's quite confusing in general I think. Here's a picture of the diagram in my revision guide, in-case my describing made no sense :P

Posted from TSR Mobile
Well the obvious bits are that the circle with the letter in are atoms, where the letter(s) represent the atomic symbol ie the c is carbon. That should be simple.

Now in a covalent bond two atoms each provide one electron, hence 2 electrons form the bond (the sharing of a pair of electrons)

Lets look at F2 (Fluorine)

First we need to work out how many electrons have in its outer shell using the 2 8 8 method.
Well the proton number of fluorine is 9 so it will have 7 electrons in its outer shell.

Good so far?

So if one atom provides on electron then we will see two two circles, with a bonded pair consisting of two electrons and 3 lone pairs (unbonded electrons).

xx --

xx CL x- Cl <--- The diagram messed up a bit me thinks

xx --

this diagram shows the covalent bonding between Cl2 where x and - are electrons.

In CO2 its the same principle just the c to o atoms form double bonds (O=C=O)

Feel free to ask any questions, and out of curiosity is this As or GCSE?

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Updated: January 1, 2013
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