About
氚 is a modern character created to meet scientific needs. It combines the semantic radical 气, indicating a gaseous substance, with the phonetic component 川, which also hints at the three particles in its nucleus. The character was designed specifically to represent tritium, the radioactive hydrogen isotope with one proton and two neutrons. Invented solely for chemical nomenclature, it has no ancient etymology or colloquial use, serving exclusively as a precise technical term in physics and chemistry.