Edexcel's specification that lists everything you need to know about the Radioactivity topic is contained in this document.
How much Iodine-131 remains?
The television drama Chernobyl inspired a series of articles in the August 2019 issue of Physics World. One of the articles was an interview with Richard Wakeford, editor-in-chief of Journal of Radiological Protection, discussing why the assessment of radiation risk is so difficult. Responding to a question asking whether access to some areas around Chernobyl … Continue reading How much Iodine-131 remains?
Neutrons and Nuclear Fission
Early models of the atom considered only two types of particles; protons and electrons. We now need to realise that there is a third particle in the nucleus as this particle turns out to be the key to using nuclear processes for electricity generation. Although natural radioactive decay happens spontaneously, it does not transfer energy … Continue reading Neutrons and Nuclear Fission
Units and Equations
Units of measurements that are created by combining other units often demonstrate how to perform the appropriate calculations. That may sound a bit confusing but knowing how this works can be very useful when answering exam questions. Let's look at what this actually means... To calculate speed we need to measure a change in distance … Continue reading Units and Equations
What are atoms?
The idea of an atom arises from a simple question: is it possible to keep breaking a piece of matter into smaller and smaller pieces or do you eventually get to the smallest piece of matter that cannot be divided any further? It turns out that the breaking cannot go on forever and there is … Continue reading What are atoms?
Graphing fun
The ability to draw and read graphs is a REALLY important skill in Physics but graphing can also be fun... I've come across a nice, and somewhat addictive, graphing game on the theuniverseandmore website. Have a look and let me know how you get on. Select World 1 and send me a screen grab to … Continue reading Graphing fun
What is radioactivity?
Radioactivity, in the context of the Edexcel (9-1) GCSE Physics course, refers to events that release energy when one atom changes into a different type of atom. The change can either be spontaneous (radioactive decay) or induced (the processes of nuclear fission and nuclear fusion). To understand how these changes can happen we need to … Continue reading What is radioactivity?
Base and Derived Units
There are seven Base Units. These are the units on which every other unit is based. So what exactly is a "unit"? A unit of measurement, or "unit" for short, tells you how something has been measured. If I said that I lived one mile from school then you would have a good idea about … Continue reading Base and Derived Units
Mr Tarrant's physbang 'blog 