(a)[2]
State what kind of radiation $\gamma$-rays are.
(b(i))[1]
State the effect, if any, on the proton number of the nucleus.
(b(ii))[1]
State the effect, if any, on the nucleon number of the nucleus.
(c(i))[1]
State what is meant by background radiation.
(c(ii))[3]
Determine the half-life of this isotope.
(d)[2]
State two precautions that should be taken when radioactive isotopes are used.