The ________ of a radioactive substance is the time required for 50 percent of a given amount of radioisotope to decay.
A) decay-point
B) mid-life
C) deterioration point
D) half-life
E) entropy

Question

Quizplus · Accepted Answer

The correct term for the time required for 50 percent of a given amount of radioisotope to decay is "half-life". Therefore, the best choice is option D - half-life. The other options listed are not correct terms used to describe this concept.

The ________ of a Radioactive Substance Is the Time Required