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Which of the following is not a radioactive element A)BerylliumB)UraniumCThoriumD)Radium |
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Answer» Answer: Beryllium is not radioactive element. Radioactive elements are MADE up of atoms WHOSE nuclei are unstable and give off atomic radiation as part of a process of attaining STABILITY. The emission of radiation TRANSFORMS radioactive atoms into ANOTHER chemical element, which may be stable or may be radioactive such that it undergoes further decay. |
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