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An isotope decreased to one fourth its original amount in 18 months. What is the half life of this radioactive isotope?

An isotope decreased to one fourth its original amount in 18 months. What is the half life of this radioactive isotope?
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An isotope decreased to one fourth its original amount in 18 months. What is the half life of this radioactive isotope?

User Anubhav Ranjan
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The rate at which a radioactive isotope decays is measured in half-life. The term half-life is defined as the time it takes for one-half of the atoms of a radioactive material to disintegrate.
User Iszi
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