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How a radioactive element will

Radioactive decay is the process by which an unstable element transforms into different element, typically releasing energy as
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2. asked by james
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An unknown radioactive element decays into non-radioactive substances. In 420 days the radioactivity of a sample decreases by 39
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An unknown radioactive element decays into non-radioactive substances. In 120 days the radioactivity of a sample decreases by 59
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during radioactive decay atoms of a radioactive element break down and change into other atoms of another element-all at oncea)
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How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?a
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26. How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?a
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26. How many half-lives does it take a radioactive substance to decay until only one-eighth of the original substance remains?A)
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Which of the following statements about radioactive dating is true?a. Radioactive decay is the rate at which new atoms form. b.
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If 70% of a radioactive element remains radioactive after 400 million years , then what percent remains radioactive after 600
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if 60% of a radioactive element remains radioactive after 300 million years, then what percent remains radioactive after 500
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2. asked by Lexi
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