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vesiniku stabiilne isotoop, isótopo del hidrógeno cuya masa o peso atómico es de aproximadamente 2, the isotope of hydrogen with proton number 1 but nucleon (mass) number 2
hydrogène lourd . Limnoloogia sõnastik. Estonian Language Institute, Sõnaveeb 2026. https://sonaveeb.ee/search/unif//lim/hydrog%C3%A8ne%20lourd/1/fra (20.06.2026)