Answer | Crossword Clue |
---|---|
SEMI | About fifty per cent: Prefix. |
orthohydrogen | the form of molecular hydrogen, constituting about 75 per cent of the total at normal temperatures, in which the nuclei of the atoms spin in the same direction |
orthohydrogens | ORTHOHYDROGEN, the form of molecular hydrogen, constituting about 75 per cent of the total at normal temperatures, in which the nuclei of the atoms spin in the same direction |