Radioactive Half-Life 4


Radioactive Half-Life 4 :

The time required for a quantity of a radioisotope to decay by half. For example, because the half-life of iodine-131 (I-131) is 8 days, a sample of I-131 that has 10 mCi of activity on January 1, will have 5 mCi of activity 8 days later, on January 9. See: Biological Half-Life, Decay Constant, Effective Half-Life. [Illustrations]

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