Radioactive Decay And Nuclear Radiation (GCSE Physics)

Which detector is commonly used to measure count rate from radioactive sources in school experiments?

A graph of count rate versus time for a decaying source shows an exponential decrease. What does the curve’s shape indicate?

Which nuclear equation represents alpha decay of thorium-232 (write products as symbols and mass/atomic numbers conceptually)?

Which type of nuclear radiation consists of two protons and two neutrons and is the least penetrating?

A sample’s activity decreases from 3200 Bq to 800 Bq in 10 minutes. How many half-lives occurred in that time?

A sample emits 500 counts per minute at 1 m distance. If the detector is moved to 2 m, approximately what count rate would be expected assuming a point source and inverse square law (neglecting background)?

A beta particle is equivalent to which of the following?

Which of the following is a correct example of radioactive decay equation for beta minus emission of carbon-14?

Which practice reduces the radiation dose to a person working with radioactive sources?

A student measures a radioactive sample for 60 seconds and records 300 counts. The background reading measured for the same time is 20 counts. What is the background-corrected count rate in counts per second?

What is the difference between irradiation and contamination?