# Chemical bounding

1. Jan 12, 2005

### danne89

Hi!
In a molecule, let's say NaOH, the Na is a positive ion and the OH a negative one. How can a molecule, OH, be negative. The binding between the O and the hydrogen is, I think, colvalent. But doesn't that mean that the OH-group is charged? And how can that group binds to the other and be NaOH?

2. Jan 12, 2005

### dextercioby

It is negative souly to the fact that one of the unpaired electrons from the oxygen atom is not hooked up in any bond.The other one is hooked up with the electron from the H atom in a covalent bond.
So basically,OH has an unpaired electron,which means a "-" net charge.What u call "molecule",is actually a radical,molecules,IIRC are electrically neutral...

Daniel.

3. Jan 12, 2005

### danne89

Can you develop your last sentence; I don't get it, maybe because me English sucks.

This's kind of new to me. Can you redirect me to a good website (yes, I've checed the Chemestry Napster).

4. Jan 12, 2005

### Gokul43201

Staff Emeritus
He is saying that $OH^-$ is not a molecule. To be a molecule, it has to be electrically neutral.

Last edited: Jan 12, 2005
5. Jan 12, 2005

### danne89

What's it then. My teacher's saying it's stable and can exist freely.

6. Jan 12, 2005

### The Bob

If I am correct, it would be a negative ion.