| H1, 1H, | H1 protium |
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| protium | The common hydrogen-1 isotope, making up 99.985% of the hydrogen-1 atoms occurring in nature. Synonym: protium. (05 Mar 2000) |
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| protium |
the mass one isotope of hydrogen; ordinary, or light, hydrogen. See hydrogen. Cf. deuterium and tritium.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| protium | genus of chiefly tropical American trees having fragrant wood and yielding gum elemi |
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| protium | tropical American tree |
| protium | tropical American tree |
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