A diagram showing an alpha particle (<i>α</i>) being ejected from the nucleus of an atom. Protons are red and neutrons are blue.
<a href="//commons.wikimedia.org/wiki/User:Inductiveload" title="User:Inductiveload">Inductiveload</a>
2007-10-05
<span class="int-own-work" lang="en">Own work</span>