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13.09.2021 •
Chemistry
What does the half-life of a radioisotope refer to?
A. The length of time the radioisotope exists as a parent element
B. Half of the total energy that will be released by a radioactive
sample
C. The length of time it takes for half of a radioactive sample to
decay
D. Half of the length of time the radioisotope remains radioactive
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Ответ:
Bone marrow
Explanation:
Red blood cells are formed in the red bone marrow of bones.