noun🔗ShareРадиоактивностьSpontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus."The old watch contained radium, which caused its hands to glow in the dark due to radioactivity. "В старых часах содержался радий, из-за чего стрелки светились в темноте из-за радиоактивности.physicsenergysubstancechemistryenvironmentsciencematerialChat with AIVocabulary GamePractice Reading
noun🔗ShareРадиоактивность, излучениеThe radiation so emitted; including gamma rays, alpha particles, neutrons, electrons, positrons, etc."The radioactivity from the old smoke detector is dangerous and should be disposed of properly. "Радиоактивность от старого детектора дыма опасна и должна быть утилизирована надлежащим образом.physicsenergysubstancescienceChat with AIVocabulary GamePractice Reading
