Answers to AQA GCSE Random nature of radioactive decay
Practice Questions
1.Explain why it is not possible to predict the count rate of a sample of radioactive isotope.
Radioactive decay is a random process and it is not possible to predict a count rate.
It is possible to estimate a count rate, but it would be an estimate and not an accurate value, because count rate would vary due to the random nature of radioactive decay.
It is possible to measure a count rate using a GM tube, but the value will constantly fluctuate due to the random nature of radioactive decay.
2. A student asked his teacher, if you heat a radioactive substance will it decay faster? Suggest the teacher’s response to the student’s question.
Radioactive decay is a random process, it is not affected by changes in temperature. This is because it is a nuclear reaction, rather than a chemical reaction.
3. Which piece of apparatus can you use to measure the count rate of a radioactive substance?
Geiger Muller Tube, connected to a Geiger counter
Absorption and Emission of EM Radiation
JJ Thomson and Plum pudding model
Ernest Rutherford and the Nuclear Model
Niels Bohr changing the Nuclear Model
Discovering the Proton and Neutron
Measuring radiation from radioactivity
Radiation types and properties
Random nature of radioactive decay
Radioactive contamination or irradiation
Hazards of contamination and irradiation
Studies on the effects of radiation on humans
Different half lives of radioactive isotopes
Nuclear Fission Chain Reaction
Writing nuclear fission equations