The ting is i was at home playing the powder toy and nuking a space station that ive bult which had a nuclear reactor on it.It exploded and gave mee an idea for cooper to control the flowe of neutrons. Usses: 1 particle of cooper absorbes 20 neutrons.so preventing the nuclear reaction in the reactor and its color is betven wire and wood, reacts with elements the same as metal conducts electrycity