Answer: A half life is the amount of time it takes for half of a radioactive substance to decay.
Explanation:
Radioactive isotopes are defined as the isotopes which undergo decay processes very easily. They have very short half life. They are usually the isotopes of heavier elements.
Half life is defined as the time taken for the unstable isotope to fall to half its original value. It is designated as [tex]t_{1/2}[/tex]
All the radioactive reactions follows first order kinetics.
The equation used to calculate half life for first order kinetics:
[tex]k=\frac{0.693}{t_{1/2}}[/tex]
where,
k = rate constant for first order kinetics
Hence, a half life is the amount of time it takes for half of a radioactive substance to decay.
