GCSE Physics - Radioactive Decay and Half Life #35

The video tutorial explains radioactive decay, focusing on concepts like activity and half-life. It describes how activity is measured in becquerels and how half-life is defined as the time taken for radioactive nuclei or activity to halve. The tutorial uses graphs to illustrate decay processes and demonstrates how to calculate half-life. It also covers practical measurement of activity using a Geiger-Müller tube and provides an example problem to calculate remaining nuclei after several half-lives.

Explain how the activity of a radioactive sample is measured.

What is the definition of half-life in the context of radioactive decay?

What happens to the decay process of a radioactive sample over time?

Describe the relationship between the number of radioactive nuclei and the activity of a sample.

How can you determine the half-life of a radioactive substance from a graph?

If a radioactive source has a half-life of 40 hours, how many half-lives will it undergo in 5 days?

Calculate the remaining number of radioactive nuclei after three half-lives if you start with 3 million.