Fluorine - 18 is a radioactive isotope that decays by positron emission to form oxygen - 18 with a half-life of 100 min. Physicians use ^(18)F for the study of brain by injecting a quantity of fluoro substituted glucose into the blood of a patient The glucose accummulates in the region where the brain is active and needs nourishment. How long does it take for 99.9% decay of .^(18)F ?

Fluorine - 18 is a radioactive isotope that decays by positron emissio

1.	Fluorine - 18 is a radioactive isotope that decays by positron emission to form oxygen - 18 with a half-life of 100 min. Physicians use ^(18)F for the study of brain by injecting a quantity of fluoro substituted glucose into the blood of a patient The glucose accummulates in the region where the brain is active and needs nourishment. How long does it take for 99.9% decay of .^(18)F ?
Answer» INFINITE TIME `16.67` hourse 10 HRS `33.33` hours Answer :B