Radioactivity
- Created by: LM
- Created on: 23-04-13 18:34
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- Radioactivity
- Some isotopes (that are not on the periodic table) are unstable, this means that they slowly decay creating radioactive particles.
- There are three types of radiation: alpha (?), beta(?) and gamma(?) which all come from the nucleus.
- Alpha Particle
- Is a helium nucleus (with out the electrons)
- Beta Particle
- Gamma Particle
- No mass, no charge, made of electromagnetic radiation, energy.
- Alpha Particle
- Ionisation
- Ionisation is when radiation particles ?,?,? can cause an electron out of an atom and so turning that atom into an ion.
- To test for radioactivity you use a Geiger-Müller tube connected to a count meter
- you can measure radiation in counts per minute (cpm) or in counts per second (cps also known as becquerel -Bq)
- Half-Life: is the average time it takes for half of the unstable nucleus to decay
- The half-life of a substance is the time it takes for half of the substance to decay
- For example, if we start with an element that has four atoms, in an hour 2 of them have decayed and in an other hour 1 more has decayed meaning the half life of that element is 1 hour.
- Half-Life: is the average time it takes for half of the unstable nucleus to decay
- The half-life of a substance is the time it takes for half of the substance to decay
- For example, if we start with an element that has four atoms, in an hour 2 of them have decayed and in an other hour 1 more has decayed meaning the half life of that element is 1 hour.
- For example, if we start with an element that has four atoms, in an hour 2 of them have decayed and in an other hour 1 more has decayed meaning the half life of that element is 1 hour.
- The half-life of a substance is the time it takes for half of the substance to decay
- Half-Life: is the average time it takes for half of the unstable nucleus to decay
- For example, if we start with an element that has four atoms, in an hour 2 of them have decayed and in an other hour 1 more has decayed meaning the half life of that element is 1 hour.
- The half-life of a substance is the time it takes for half of the substance to decay
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