2H, nke ọzọ na-adịgide adịgide hydrogen isotope, a maara dị ka deuterium na nwere otu proton na otu neutron na nucleus. All deuterium na eluigwe na ala na-eche na e mepụtara n'oge Big Bang, na-atachi obi ebe ọ bụ na oge. Deuterium abụghị redioaktivu, na-adịghị na-anọchi anya a ịrịba toxicity ize ndụ. Mmiri enriched na ụmụ irighiri na-agụnye deuterium kama nkịtị hydrogen a na-akpọ arọ mmiri. Deuterium na ya ogige na-eji dị ka a na-abụghị radioactive labelụ na chemical nnwale na na solvents maka 1H-NMR spectroscopy. Arọ mmiri na-eji dị ka a neutron moderator na coolant maka nuclear reactors.
2H