1) Which of the following is a practical use of nuclear radiation? a) radiotherapy to treat cancer b) chemotherapy to treat cancer c) carbon dating to treat cancer d) radioactice tracers to treat cancer 2) Which of the following is a practical use of nuclear radiation? a) radiotherapy for energy generation b) nuclear power for energy generation c) carbon dating for energy generation d) radioactice tracers for energy generation 3) What does the term activity mean? a) How long it takes of radiation to decrease by half b) How dangerous the radiation is c) The number of decays in 1 second d) How much energy is generated 4) identify the apparatus used to measure radioactive activity. a) photometer b) geiger muller counter c) spectrometer d) carbon dating 5) Units used to measure activity. a) degrees (o) b) Bequerels (Bq) c) centimeters (cm) d) nanometers (nm) 6) The three types of ionising radiation a) alpha, beta and ultraviolet b) alpha, bequeral, gamma c) infrared, bete and gamma d) alpha, beta and gamma 7) The type of ionising radiation made up of 2 protons and 2 neutrons. a) alpha b) beta c) gamma 8) The type of ionising radiation made up of high energy electrons. a) alpha b) beta c) gamma 9) The type of ionising radiation made up of high energy electromagnetic photons a) alpha b) beta c) gamma 10) The type of ionising radiation that will be stopped by a thin piece of paper. a) alpha b) beta c) gamma 11) The type of ionising radiation that requires a few cm of lead to stop it. a) alpha b) beta c) gamma 12) The type of ionising radiation that will be stopped by few mm of aluminium. a) alpha b) beta c) gamma 13) A radioactive source has a half-life of 30 minutes. The source has an initial activity of 1000 Bq. Calculate the activity of the source after 1.5 hours. a) 500 b) 250 c) 125 d) 62.5

radiation practice questions

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