Not to be confused with nitronium, another element.
Neutronium is a green element and a good clean energy source to have around. It is found in abundance on the comet Twonkus-3 and named after James Neutron who discovered it. And Carl Wheezer thinks it’s pretty, too. Collecting five pieces of crystallized neutronium seems to have a beneficial effect on health and stamina, but research is inconclusive as to why.