放ほう射しゃ性せい同どう位い元げん素そMeaningsNoun1. radioisotope; radioactive isotopeKanji used放release射shoot性nature (of a person)同same位rank元origin素elementaryPitch accentほうしゃせいどういげんそComposed of放ほう射しゃ性せいradioactiveNoun同どう位いthe same rank; the same digitNoun元げん素そelement; chemical element; (classical) element (e.g. earth, water, air, fire)Noun