Demonstration: measuring the half-life of a radioactive isotope brings some of the wonder of radioactive decay into the school...

Practical Activity 14-16

Class practical: in this activity, students model radioactive decay using coins and dice. By relating the results from the...

Practical Activity 14-16

Initially, students may regard atoms as the fundamental chemical particles. True, electrons can be chipped off an atom, and...

Teaching Guidance 14-16

One of the most important characteristics of radioactivity is that it decays exponentially. This has two basic mathematical...

Teaching Guidance 14-16

The rate of decay of a radioactive source is proportional to the number of radioactive atoms (N) which are present.

Teaching Guidance 14-16

Henri Becquerel discovered radioactivity in 1896. Fortunately, he kept a detailed diary of his experiments. This shows that...

Physics Narrative 14-16