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| protium m (I. Havkin); hydrogène normal | |||
| hydrogène léger | |||
| Russian thesaurus | |||
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| 1Н, стабильный и наиболее распространённый 99,98% изотоп водорода с массовым числом 1. Ядро атома протия - протон. Большой Энциклопедический словарь | |||
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