Iconic picture of an atom according to the popular perception of the Bohr model, showing “electrons” orbiting a “nucleus” both depicted as spheres
<a rel="nofollow" class="external text" href="https://pixabay.com/de/users/geralt-9301/">Gerd Altmann</a>
2016-03-01
<a rel="nofollow" class="external free" href="https://pixabay.com/de/atom-elektron-neutron-atomkraft-1222511/">https://pixabay.com/de/atom-elektron-neutron-atomkraft-1222511/</a> <bdo lang="en" dir="ltr" title="archived on 18 January 2019 at the Wayback Machine"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20190118195732/https%3A//pixabay.com/de/atom-elektron-neutron-atomkraft-1222511/">archive copy</a></bdo>