partially expanded version of periodic table
<a href="//commons.wikimedia.org/wiki/User:Mrmw" title="User:Mrmw">Mrmw</a>   and  <a href="//commons.wikimedia.org/w/index.php?title=User:Droog_Andrey&amp;action=edit&amp;redlink=1" class="new" title="User:Droog Andrey (page does not exist)">Droog Andrey</a>
Own work based on: <a href="//commons.wikimedia.org/wiki/File:Pt172new.png" title="File:Pt172new.png">Pt172new.png</a>: <a href="//commons.wikimedia.org/wiki/File:Pt172new.png" class="image"><img alt="Pt172new.png" src="https://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Pt172new.png/80px-Pt172new.png" decoding="async" width="80" height="17" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Pt172new.png/120px-Pt172new.png 1.5x, https://upload.wikimedia.org/wikipedia/commons/thumb/9/9b/Pt172new.png/160px-Pt172new.png 2x" data-file-width="832" data-file-height="180"></a>