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Physics Paper 1 - Coggle Diagram
Physics Paper 1
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Radiation
Alpha Particle
mass of 4, charge of +2, slow speed, high ionising ability, low penetrating power, stopped by paper.
Beta Particle
mass of 1/2000, charge of -1, fast speed, medium ionising ability, medium penetrating power, stopped by aluminium.
Gamma Particle
mass of 0, charge of 0, very fast speed, 0 ionising ability, high penetrating power, stopped by lead.
Gas pressure
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Since the particles in a gas are moving fast and randomly, collisions occur frequently.
Half life
The time it takes for half of the unstable nuclei in a sample to decay, or for the activity of the sample to half or for the count rate to half.
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