Alternative "Left Step", or ADOMAH, periodic table in horizontal format. See <a class="mw-selflink-fragment" href="#Legend">legend</a> below.
<a href="//commons.wikimedia.org/wiki/User:Ch1902" title="User:Ch1902">Ch1902</a> (vectorisation), <a rel="nofollow" class="external text" href="http://www.perfectperiodictable.com/contactus">Valery Tsimmerman</a> (original design)
CC BY-SA 3.0
<a href="//commons.wikimedia.org/wiki/File:Adomah_Wiki.JPG" title="File:Adomah Wiki.JPG">File:Adomah_Wiki.JPG</a>