what part of an original isotope number of atoms remains have two half life
Biology · High School · Mon Jan 18 2021
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Answer: After the two half lives, a quarter of an isotopes original number of atoms remains . Therefore, after one half-life, 50 percent of the initial parent nuclei remain; after two half-lives, 25 percent; and so forth. The intensity of radiation from a radioactive source is related to the half-life and to the original number of radioactive atoms present.