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元素之同位素,有具放射性,即能蛻變者;亦有无放射性即性安定者。可由其原子序数及質量整數推知之。此推定原則,用於1949年所知之一切问位素,不論共為天然者,或人始者,皆十分完滿,而極少列外。惟其僅是作者之實驗原则,尚乏理論導講。謹此貢獻出來,敬向化學高明請教。
Elements of isotopes, have a radioactive, that is, those who can transform; there is no radioactive that is, those who stability. Can be inferred from its atomic number and mass integer. This principle of presumption, used in all the elements of knowledge known in 1949, whether natural or human, is very complete, with few exceptions. However, it is only the author’s experimental principle, there is no theoretical guidance. I would like to contribute, respect to learn chemical wise.