Before revision: Carbonaceous chondrite fission xenon Carbonaceous chondrite fission xenon , often abbreviated as CCF Xe , are a collection of different isotopes of xenon that were thought to have arisen from the decay of a superheavy element within the island of stability.
After revision: Carbonaceous chondrite fission xenon Carbonaceous chondrite fission xenon (CCF Xe) , are a collection of different isotopes of xenon that were thought to have arisen from the decay of a superheavy element within the island of stability.