The relationship between the activity R, the disintegration constant λ, and the remaining number N of radioactive nuclei is:
A)N = λR
B)R = λN
C)R = λ/N
D)R = N/ λ
E)R = λ ln N

Question

Quizplus · Accepted Answer

The activity R of a radioactive sample is directly proportional to the number of remaining radioactive nuclei N, with the disintegration constant λ as the proportionality constant, hence R = λN.

The Relationship Between the Activity R, the Disintegration Constant λ