It might be a bit difficult to fix, but electronics are super unrealistic in TPT right now.
My suggestions:
Propane (PRPN): Basically a fuel gas (we have gas but this one should be less diffuse)
Liquid Trnititoluene (LTNT): TNT is a solid that (IRL) liquifies at about 90C
New color for TNT: In TPT, TNT is redish but In Real life is yellowish
Liquid Hydrogen: IRL, Hydrogen is liquified, I think that this one could be useful for make bombs
Solid Hydrogen: Hydrogen can be solid under really low temperatures or high pressure
Dirt: In real life, dirt is a very common powder, I'm not sure about may uses through
Moving solids: In real life, solids fall due gravity... You know that I'm kidding. While we can have some real elements, TPT will never be 100% realistic, I wrote this since I can NOT emphasize this enough, some people still want a 1000% realistic TPT.
More suggestions:
Napalm (NPLM): A flammable liquid that burn very hot for very long, commonly used in warfare
Liquid Noble (LNBL): A superfluid, extremely cold, (IRL) Noble gases can liquify at extremely low temperatures (-265 C) or very high pressure (>200)
Noble Ice (NBIC): Formed when liquid helium is cooled to absolute zero and under pressure of >225. Superconductor.
Neptunium (NPTM): Radiocative element, (IRL) simmilar to Plutonuim, In TPT, could be used as a fissible element, reactive with PROT
https://powdertoy.co.uk/Discussions/Thread/View.html?Thread=20159
Anyways I made a mod with a isotope property and epic uranium/plutonium explosions, along with magma gas and general solids. But I never finished and released it, hopefully you'll do better :P
Also I had portal gels :) With realistic staining too