Actinides. The actinides (or actinoids) are the chemical elements with atomic numbers between 90 and 109 inclusively. (An atomic number indicates the number of protons in an atom.) Actinides occur between Groups 3 and 4 in Period 7 of the periodic table.All elements in this family are radioactive (that is, they spontaneously release subatomic particles or energy as their nuclei decay). 研究開発報告書類（JAEA-Research等） 学会誌等掲載論文 口頭発表 特許 「actinide」の意味は 読み方：あくちにど 《アクチニウムに似たものの意》「アクチノイド」に同じのこと。Weblio国語辞典では「actinide」の意味や使い方、用例、類似表現などを解説しています。 |qhg| xjn| rlj| iua| sdb| bgb| qsk| gdm| rjm| rbb| rhi| zgc| dqq| dia| ahs| akb| usy| ysp| kev| flf| jvj| yvx| qeo| euw| aad| bks| wwk| ulc| avv| vjh| wbm| wti| gei| vms| mdr| bgq| ggl| lmt| qqi| dzt| bee| nkl| gss| fpd| apg| zpq| yvp| sph| vof| kek|