THIX, this is already a great app, but I have some ideas on what you could add:
1) Add all the elements in there.
There are 118 elements on the periodic table and I think it would be great if you could add them all.
2) A compound maker would also be great. What Im saying is that you could add a mechanic where you could arrange certain atoms to create different compounds.
3) Make the gases a little more visible. I know it may not be completely realistic but maybe just add like a little color to the gases so we can see them better. Again, not too much as too much color will make it unrealistic.
This is already a great app, but with a few improvements, it could be even better.
dr_partydude about BEAKER by THIX