"L.W. (=DFill) Hughes III" > wrote in message =
...
> Stephen Cowell wrote:
> >=20
> > You don't understand the difference between
> > a mixture and a chemical compound.

> How about telling us what you think they are.

It would be much easier to let others tell the tale...

http://wordnet.princeton.edu/perl/we...mical+compound

http://en.wikipedia.org/wiki/Chemical_compound

Particularly edifying are the following, from Wiki:

<>
A chemical compound is a chemical substance formed from two or more =
elements, with a fixed ratio determining the composition. For example, =
dihydrogen monoxide (water, H2O) is a compound composed of two hydrogen =
atoms for every oxygen atom.=20

In general, this fixed ratio must be fixed due to some sort of physical =
property, rather than an arbitrary man-made selection. This is why =
materials such as brass, the superconductor YBCO, the semiconductor =
aluminium gallium arsenide, or chocolate are considered mixtures or =
alloys rather than compounds.=20
</>
__
Steve
..