Several shortened names were soon suggested for the three emanations: exradio, exthorio, and exactinio in 1904; radon, thoron, and akton in 1918; radeon, thoreon, and actineon in 1919, and eventually radon, thoron, and actinon in 1920.
人們為這三種氣體提出了多套命名方案：1904年的exradio、exthorio和exactinio，1918年的radon、thoron和akton，1919年的radeon、thoreon和actineon以及1920年最終的radon、thoron和actinon。