Question

The rate constant (k) for the decay of the radioactive isotope I-131

A) depends on the initial quantity
B) is constant over time
C) increases with temperature
D) is unaffected by decay

Answer 1

The rate constant (k) for the decay of the radioactive isotope I-131 is constant over time.

Step-by-step explanation:

The rate constant (k) for the decay of the radioactive isotope I-131 is B) is constant over time. The rate constant represents the probability of decay per unit of time and remains constant for a specific radioactive isotope under given conditions, regardless of the amount or initial quantity of the isotope or the progress of the decay process. Therefore, the correct option is B) is constant over time.