A compound is any molecule. It's any two or more atoms joined by covelant or ionic bonds. Solutions are when something dissolves in a liquid and the molecules of the substance become evenly distributed in the liquid and won't settle out. A heterogenous mixture is when you mix liquids and other liquids or solids and they don't dissolve together, but instead are different at different points; milk is an example. Even though it looks the same everywhere, there are actually little droplets of fats and stuff suspended in it, and if you let it sit, the fats will separate out.
|