Homework Help: Chemistry - HELP IGCSE

Posted by AMY on Sunday, January 27, 2008 at 1:04pm.

I have a chemistry exam tomorrow and I don't get the double bonding in covalent bonding

I tried many websites , textbooks and other books and yet nothing worked

Can someone please expain it clearely and in a simple way and please don't put any links for websites ca use belielve it I tried all of them !

Please help

Chemistry - HELP IGCSE - Ms. P, Sunday, January 27, 2008 at 1:10pm
Alright, so double bonding is when the elements share two pairs of electrons.

For example:

CO2 has two double bonds.

There are 4 dots around carbon, and 6 dots around oxygen. So make the Lewis dot structure and you will get two double bonds.
Chemistry - HELP IGCSE - Mary Lame, Sunday, January 27, 2008 at 1:33pm
Thanks alot

Ok , does double bonding occur with diatomic atoms , or when do we use them basically ?
Chemistry - HELP IGCSE - drbob222, Sunday, January 27, 2008 at 2:16pm
Double bonding MAY occur with diatomic molecules but not most of the time. When do we use double bonds. The simplest answer is we use them when the two atoms being bonded must share TWO PAIRS of electrons. Sharing one pair of electrons is a single bond. Sharing two pairs is a double bond. Sharing three pairs is a triple bond. In other words, a pair is a bond, two pairs a double bond, and three pairs a triple bond. I'll stop there if that is sufficient but the next obvious question is, "How do we know if we need to share a pair, or two pairs, or three pairs?"
Chemistry - HELP IGCSE - luly, Tuesday, February 26, 2008 at 10:07am
give an example of a hydrophobic

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