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7 Radioactivity and Particles – Part A “Units”

Syllabus Aims…

7.1 use the following units: becquerel (Bq), centimetre (cm), hour (h), minute (min), second (s).

 

Definitions…

The Becquerel symbol: Bq is the SI derived unit of radioactivity. One Becquerel is defined as the activity of a quantity of radioactive material in which one nucleus decays per second. The Becquerel is therefore equivalent to an inverse second, s−1.

Metre (m): the fundamental unit of length in the metric system, equal to 100 centimetres or approximately 39.37 inches. 1cm = 0.01m

The second is the SI base unit of time, commonly understood and historically defined as ​1⁄86400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each.  There are 602 seconds or 3600s in 1 hour and 24*602 = 86400 in a day

Resources…

Use this PowerPoint for a quick review…7A Radioactivity and Particles

 

Useful Videos…

Extension Ideas…

Permanent link to this article: https://www.animatedscience.co.uk/igcse-physics-introduction-and-resources/7-radiation-particles-part-a-units

7 Radioactivity and Particles – Part B “Radioactivity”

Syllabus Aims…

7.2 describe the structure of an atom in terms of protons, neutrons and electrons and use symbols such as C14  to describe particular nuclei

7.3 know the terms atomic (proton) number, mass (nucleon) number and isotope

7.4 know that alpha (a) particles, beta ( b-) particles and gamma (g) rays are ionising radiations emitted from unstable …

7 Radioactivity and Particles – Part C “Fission and Fusion”

Syllabus Aims…
7.17 know that nuclear reactions, including fission, fusion and radioactive decay, can be a source of energy
7.18 understand how a nucleus of U-235 can be split (the process of fission) by collision with a neutron, and that this process releases energy in the form of kinetic energy of the fission products
7.19 know that the …

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