A student measures the count rate from a radioactive source over a 15-minute period.
Name an instrument the student should use to detect the radiation emitted from the source.
State two sources of background radiation.
Describe the procedure the student should follow to measure the background radiation and correct the count measurement.
The radioactive source used by the student emits alpha radiation. Describe how the nucleus of an atom is changed by the emission of an alpha particle.
State two ways that the student can reduce the risks when working with radioactive sources in a laboratory.