Well, I got a "game". Suggest here elements from the periodic table! (maybe one of the ideas will be accepted).
If the element is already in TPT or if it is a noble gas, skip it.
Be serious please.
I suggest Helium from my suggestions list.
I also suggest Bismuth (BSMH) rainbow metal which creates rainbow square crystals and it's good-looking decorative material.
Sodium (SDUM). Temperature increases up to 700 C when touching WATR. Creates EMBR and FIRE when reacting with WATR.
Boron (BRON) - Lets NEUT pass through, halfing their life every frame. Also, is a one time wire.
Francium (FRNC), Decays into NEUT when touching water or under high pressure. Harmful to STKM.
Osmium (OSMI), Very high melting point (+4000 C) but brittle. Conducts heat and electricty better than TUNG.
Radon (RADN), (I know it's a noble gas but it would be different from NBLE), Radioactive gas, diffuses very quickly and produce LEAD when undergoes fusion. (+9950 C/ 245 P) Harmful to STKM.
Lead (LEAD), Solid, Lower melting point than most materials (900 C), resists high pressure. Harmful to STKM.
I suggest unnunoktium (118 element). It's extreamly unstable. Lives only for 2 frames. Looks like EXOT in solid form. Explodes in normal envirioment on NEUT, PROT, Uranium, Plutonium, Lead and Radon (from earlier comment), THDR. Generates high preassure and 10000*C. Sometimes creates SING, VIBR or EXOT. It becomes more stable in negative preassure (<-200.00) and low temp (<-270*C).
Other reactions - unknown
docRoboRobert You know that the name changed to Oganesson
Umm... nope. Good to know, but when?
@docRoboRobert (View Post)
Neat, but... how could we store/use it?
BROM - Bromine. Oh, this would be hard; liquid, injures PLNT and WOOD, reacts explosively with metals and slowly releases CAUS. Also explodes into CAUS in contact with water.
@TPT_PL: It becomes more stable in negative preassure and low temperatures. It can be usefull with bombs and space simulation, or for "Break that wall challenge".