Radioactive Decay Activity Formula

00:00 1 marks

The activity of a radioactive sample is $A$ and its decay constant is $\lambda$. The number of nuclei in the sample is $N$. Which equation is correct?

A

$A = N / \lambda$
B

$A = \lambda / N$
C

$A = \lambda N$
D

$A = \ln(2) / (\lambda N)$

Hint Hint

Hint

Recall the definition of radioactive activity. Activity represents the rate of decay, which depends on how many radioactive nuclei are present and the probability of decay per nucleus (related to the decay constant).

Answer Answer
Mark Scheme Mark Scheme
Explanation Explanation
Examiner Tips Examiner Tips
Common Errors Common Errors
Real World Context Real World Context

Answer Answer

Complete Answer

$A = \lambda N$

Mark Scheme Mark Scheme

Answer Explanation Answer Explanation

Examiner Tips Examiner Tips

Common Errors Common Errors

Math Editor

Welcome Back!

Create your account

Build skills for today, tomorrow, and beyond. Education to future-proof your career.

By clicking "Sign in," you agree to our Terms of Use and our Privacy Policy

Hint: The password should be at least eight characters long. To make it stronger, use upper and lower case letters, numbers, and symbols like ! " ? $ % ^ & ).