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GCSE Physics Atomic Structure Techniques questions

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1. Describe the structure of the nucleus of the isotope shown below. 227 Ac 89 2. Complete the decay equation, showing an isotope decaying via alpha decay into an unknown element, X. 221 Pa � ... � ….. X + ….. ……… 91 ….. ….. 3. Complete the decay equation, showing an isotope decaying via beta decay into an unknown element, X. 34 P  ….. X + ….. ……… 15 ….. ….. 4. Determine the half-life of a radioactive source which decreases from an activity of 160 Bq to 20 Bq in 48 years. 5. Determine the fraction of a radioactive source which has decayed after 24 hours, if the source has a half-life of 12 hours. 6. Draw a diagram showing a nuclear fission chain reaction.7. Explain which of the isotopes in the table would be the best choice for use as: Isotope Half-life Emission (a) a radioactive medical tracer (b) a source in a radiotherapy machine A 4 hours α B 2 years β C 10 days β γ D 20 minutes γ E 4 years α β γ 8. Use the graph to accurately determine the half-life of the radioactive source. Activity /Bq 48 42 36 30 24 18 12 6 0 40 80 120 160 200 240 280 320 360 Time /hours 9. Describe and explain how the model of the atom has changed over time. You may use diagrams as part of your answer.GCSE Physics Atomic Structure Techniques “Students should be able to…” Sheet 2 1. Describe the structure of the nucleus of the isotope shown below. 229 Th 90 2. Complete the decay equation, showing an isotope decaying via alpha decay into an unknown element, X. 224 Th  ….. X + ….. ……… 90 ….. ….. 3. Complete the decay equation, showing an isotope decaying via beta decay into an unknown element, X. 40 Ar  ….. X + ….. ……… 18 ….. ….. 4. Determine the half-life of a radioactive source which decreases from an activity of 140 Bq to 8.75 Bq in 24 hours. 5. Determine the fraction of a radioactive source which has decayed after 32 hours, if the source has a half-life of 16 hours. 6. Draw a diagram showing a nuclear fission chain reaction.7. Explain which of the isotopes in the table would be the best choice for use as: Isotope Half-life Emission (a) a radioactive medical tracer (b) a source in a radiotherapy machine A 4 hours α B 2 years β C 10 days β γ D 20 minutes γ E 4 years α β γ 8. Use the graph to accurately determine the half-life of the radioactive source. Activity /Bq 40 35 30 25 20 15 10 5 0 30 60 90 120 150 180 210 240 270 Time /days 9. Describe and explain how the model of the atom has changed over time. You may use diagrams as part of your answer.GCSE Physics Atomic Structure Techniques “Students should be able to…” Sheet 3 1. Describe the structure of the nucleus of the isotope shown below. 31 P 15 2. Complete the decay equation, showing an isotope decaying via alpha decay into an unknown element, X. 220 Ra  ….. X + ….. ……… 88 ….. ….. 3. Complete the decay equation, showing an isotope decaying via beta decay into an unknown element, X. 26 Na  ….. X + ….. ……… 11 ….. ….. 4. Determine the half-life of a radioactive source which decreases from an activity of 80 Bq to 20 Bq in 40 hours. 5. Determine the fraction of a radioactive source which has decayed after 36 hours, if the source has a half-life of 12 hours. 6. Draw a diagram showing a nuclear fission chain reaction [Show More]

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