…When these are classified by atomic number, there are about 100 types, which are elements, and nuclides with the same atomic number are isotopes. Among nuclides, stable ones are called stable nuclides, and there are about 210 types, but the rest are unstable, which are called radioactive nuclides. Elements that contain radioactive nuclides are radioactive elements. … *Some of the terminology that refers to "stable nuclides" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…これらを原子番号で分類すると約100種になり,これが元素であり,原子番号の等しい核種が同位体である。核種のうち安定なものを安定核種といい,約210種あるが,残りは不安定で,これを放射性核種といっている。放射性核種を含む元素が放射性元素である。… ※「安定核種」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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