Hah hah - in other words, you've noticed that all the really *interesting* chemistry happens at surfaces. Full marks!

It's much more complicated though, so you generally don't do any till the 2nd year of university...

There's probably some oxygen bonded on at the surface though, something like that (I don't actually know!)

http//www.feline1.co.uk

Possibly C—H bonds as well?

I do know that it is no easy to get the answer. My teacher refused to answer me due to this reason...

However, I do want to know! That's why I post it here. Is there anybody that can reply this question surely?

Thank you very much for the replies above. I know little more what my question is about.

At university I did some research into nanotechnology and found the answer to this. The terminal C will be bonded to H atoms. So pure carbon?

Diamonds typically crystallize in the face-centered cubic crystal system and consist of tetrahedrally bonded carbon atoms. The tetrahedral arrangement of atoms is the source of many of diamond’s properties. The carbon atoms in Graphite, another form of carbon. display a different (nontetrahedral) connectivity and as a result shows dramatically different physical characteristics: graphite is a soft, dark gray, opaque mineral. Other elements of the carbon group such as silicon crystalize like diamond.