there are several 'placeholders' on the periodic table, all of them representing radioactive elements that havent been discovered yet, like ununtium, ununbium, ununtrium, ununquadium, etc. if one was implemented, since the properties arent known, when drawn, each time you click, it would cycle through solid, liquid, or powder and or gas, and react to different things in different ways for each time its drawn. idk if thats possible to code, but it would be pretty cool to have an element that would react one time to neut, then next time its drawn, react with water, etc