Is it possible to add a new property to elements via mod? something like tmp or life that is stored in elements.
My suggestion is adding a new property called 'atomic mass'. Atomic mass = protons + (neutrons * (2001/2000)) + (electrons * (1/2000)) or if you want it to be more simple then do protons + neutrons. Imagine a complicated decay function for every element that uses this atomic mass along with proton count.
Well... I haven't been here for a long time. Probably lost of new elements have been suggested. So, my suggestion is Cesium (yes, CESM from my list) - sexier brother of Rubidium. More interesting, more reactive and way more usefull. Yellow metal, which melts at 28*C. Change PHOT into ELEC like in real life. Explosive. Change its life from 0 - 1 and from 1 - 0 every frame (atomic clock). React with ACID, WATR, DSTW, CAUS and other elements. Conductive.
THAL - Thallium. Metal that is deadly to STKM.
CBLT - Cobalt: Radioactive metal that has a slightly higher melting point than regular metal and slower conducting
TCNT - Technetium: shiny silver powder very unstable and radioactive and sticks to metals