I think this is a nice concept and I could def see this being expanded further and be a great study tool.
Needs a little tweaking, but I think you may already know which areas: The randomisation meant that I had nothing but 2Na for a while; and, would be great to get the molecular formula for the product created. But, for a short game jam, I think this is still a good start.
It didn't quite hit the signature theme 'Frequency' though I might understand if there was confusion when the theme 'reactions' was provided to the host.