The half-life of a radioactive substance is best define as:Group of answer choicesThe time it takes for half of the substance to regenerateThe time it takes for a given amount to increase by halfThe time it takes for a given amount to reduce by halfThe time it takes for half the substance to react

What is the half-life of a radioisotope?A.The amount of time it takes for a radioisotope to get halfway to a stable formB.The amount of time a radioisotope exists as the parent elementC.The amount of time it takes for half of the radioisotope to formD.The amount of time it takes for half of the material to decay

radioactive isotope decays with a rate proportional to the original amountof material present. If originally there is 50mg of the material present and aftertwo hours it has lost 10% of its mass, determine the half-life, the time at which itis half its original mass.

The half-life of a radioactive element which has only 1 of its original mass leftafter elapsed of 60 days is:A. 30 days ⃝ B. 20 days ⃝C. 15 days ⃝ D. 12 days

A rate of decay of a radioactive element is independent of temperature, pressure, Infact for any external conditions. A simple law discovered by Rutherford states that a certain fraction of any sample of radioactive element undergoes change in a unit time. If we start with 10 mg of the radioactive substance  (t​1​​2  =  1day)  , only  5mg   will be left at the end of the first day. At the end of 2nd day 2.5 mg will be left and so on. λ  =  2.303tlogaa − x A human body required the  0.01μ   activity of radioactive substance after 24 hours. Half life of radioactive is 6  hours. Then injection of maximum activity of radioactive substance that can be injected:

The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 180 grams of a radioactive isotope, how much will be left after 3 half-lives?