1592952556000 1312632483000 term-3389 1616541416488 1312632487000 1616290572255 adlib fitz-online adlib-term-3389 af2f73b0-2ffe-31d4-b680-def56ee3df05 2 1 scope note The phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. RHDEL2 reference term-3385 adlib-term-3385 ee198b4a-cdf9-3c0b-9711-810f0227edf3 radioactive D.DC.AFU.ALO.BCW.BUE 1 code D.DC.AFU.ALO.BCW.BUE 1 radioactivity reference term-3390 adlib-term-3390 2c73566a-e9a2-3d8f-84d3-614774d8f47d chemical properties radioactivity term