Question

Radioactive element decays to form a stable nuclide, then the rate of decay of reactant is shown by:

• A. A
• B. B
• C. C
• D. D

Hint:

The rate of decay of radioactive elements typically follows an exponential decay law.

Answer 1

The Correct Option is A

The decay of a radioactive element follows an exponential decay curve. The plot shown in option (a) depicts the typical behavior where the decay rate is proportional to the amount of the reactant remaining, leading to the exponential decay.
Final Answer: \[ \boxed{a} \]