The periodic table widget provides a link that pops-up an interactive periodic table.  Here are static images.

The pop-up is clickable, searchable, draggable, and resizable.  It is available in the WordPress Qwizcards plugin or as stand-alone code (for your own, non-WordPress site) from GitHub.

In WordPress, the link is created with the [qperiodic_table] shortcode.  For example, entering this in the WordPress editor…

[qperiodic_table]Pop-up periodic table[/qperiodic_table]

results in…

Pop-up periodic table

Click the link to get the interactive experience!

The stand-alone code uses jQuery, with these scripts/css, for example:

<script src="https://code.jquery.com/jquery-3.6.3.min.js"></script>
<script src="https://code.jquery.com/ui/1.13.2/jquery-ui.min.js"></script>
<link rel="stylesheet" href=" https://code.jquery.com/ui/1.13.2/themes/base/jquery-ui.css">

 and these scripts/css from the GitHub repo:

<script src="qwiz_periodic_table.js"></script>
<script src="qwiz_zoom.js"></script>
<link rel="stylesheet" href="qwiz_periodic_table.css">

Create the link something like this:

<span style="display: inline-block;" onclick="q_periodic_table_.init (this)">
   <a href="#">
      Pop-up periodic table
   </a>
</span>