A van der Waals' surface coloured according to charge, superimposed on a ball-and-stick model of the ammonia molecule, NH<sub>3</sub>.  Red represents partially negatively charged regions, blue represents partially positively charged regions, and white represents neutral (uncharged) regions. Created in Accelrys DS Visualizer 1.5, edited with Photoshop Elements 3.0.
<a href="//commons.wikimedia.org/wiki/User:Benjah-bmm27" title="User:Benjah-bmm27">Ben Mills</a>
2007-11-30
<span class="int-own-work" lang="en">Own work</span>