unbinilium

noun

1. The systematic element name for the (as yet undiscovered) chemical element with atomic number 120 (symbol Ubn).“Our question at the beginning of this essay was "are there more elements to be discovered?" The next elements would be ununennium (atomic number 119) and unbinilium (atomic number 120). The problems in trying to produce these elements by accelerating an ion beam into a target are the short half-lives of possible target elements and the extended times required for a successful observation of a new ”