The time it takes for half of a radioisotope's atoms to decay ____.

A) cannot be calculated
B) is used to construct the geologic time scale
C) is its half-life
D) is the same for uranium 238 and carbon 14
E) is highly variable

Question

The time it takes for half of a radioisotope's atoms to decay ____.
 
A) cannot be calculated
B) is used to construct the geologic time scale
C) is its half-life
D) is the same for uranium 238 and carbon 14
E) is highly variable

Quizplus · Accepted Answer

The time it takes for half of a radioisotope's atoms to decay is known as its half-life.

The Time It Takes for Half of a Radioisotope's Atoms