GENERAL KNOWLEDGE

Detailed explanation-1: -The half life period of a radioactive element is the time required for a quantity to fall to half its value as measured at the beginning of time period. It does not depend on the temperature, concentration or the amount of element, but just depends on the time factor.

Detailed explanation-2: -There are two factors that affect the elimination half-life of a drug, which include its clearance and volume of distribution. The clearance of the drug (CL) refers to the rate at which the body eliminates the drug from the body.

Detailed explanation-3: -The degree of radioactivity depends on the fraction of unstable nuclei and how frequently those nuclei decay. The effect of radioactivity also depends on the type and energy of the particles produced during nuclear decay.

Detailed explanation-4: -The half-life of a radioactive isotope is the amount of time it takes for one-half of the radioactive isotope to decay. The half-life of a specific radioactive isotope is constant; it is unaffected by conditions and is independent of the initial amount of that isotope.