Difference between revisions of "5-RAD-03"
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==Main Body of Lesson== | ==Main Body of Lesson== | ||
| − | * | + | * start with an example of a nuclear reaction in which an alpha particle is released. Discuss that ''the atomic number and the mass number before reaction must be the same after the reaction''. |
| − | + | * the atomic number decreases by 2 and the mass number decreases by 4. The initial nucleus changes into a ''different element''. | |
| + | * when introducing beta decay, recall that a beta particle is a free moving electron, so beta decay must mean 'release of a beta particle/ELECTRON from INSIDE the nucleus' HOW's that posible????? | ||
| + | * | ||
==Plenary== | ==Plenary== | ||
Revision as of 13:12, 2 March 2011
Contents
Outcomes
- Pupils can describe the changes on the atomic and mass number of a nucleus when a alpha or a beta or a gamma particle is released
- Pupils can balance nuclear equations
- pupils identify the good uses of radioactive particles
- pupils identify the dangers caused by the radioactive radiation
Specification References
- 7.6 describe the effects on the atomic and mass number of a nucleus of the emission of each of the three main types of radiation
- 7.7 understand how to complete balanced nuclear equations
- 7.8 understand that ionising radiations can be detected using a photographic film or a Geiger-Muller detector
- 7.9 recall the sources of background radiation
- 7.13 describe the uses of radioactivity in medical and non-medical tracers, in radiotherapy and in the radioactive dating of archaeological specimens and rocks
- 7.14 describe the dangers of ionising radiations, including:
- radiation can cause mutations in living organisms - radiation can damage cells and tissue - the problems arising in the disposal of radioactive waste
Starter
- recall and stress the idea that all radiation (alpha, beta and gamma) comes from INSIDE the nucleus
Main Body of Lesson
- start with an example of a nuclear reaction in which an alpha particle is released. Discuss that the atomic number and the mass number before reaction must be the same after the reaction.
- the atomic number decreases by 2 and the mass number decreases by 4. The initial nucleus changes into a different element.
- when introducing beta decay, recall that a beta particle is a free moving electron, so beta decay must mean 'release of a beta particle/ELECTRON from INSIDE the nucleus' HOW's that posible?????
Plenary
- ==Homework==
