Can you add bismuth which can grow colorful crytals if its melting and with a lower melting point than other metals and a bit radioactive.
2nd Suggestion (Not a great idea): UNKN or Unknownium. It has some unknown properties, very radioactive (Life between 10 sec - 30 mins). Sparks with TTAN, PSCN, NSCN and GOLD only. Very reactive to DUST, NITR, OXGN, HYGN and PROT. UNKN => POLO & URAN when its life ends.
wait there are 3 spaces left + 4 in use are 7 spaces, you saied 6 spaces
wait are you ignoring me rebmmi
Wait, I think @ArolaunTech suggested graphite before @micro. Would you both like to be credited?
A, and CANN: cannon that acts as a cray that when sparked fires BOMB as if it were a FRAY and CRAY cannon