(a(i))[1]
Determine how many electrons are present.
(a(ii))[1]
Determine the nucleon number from the particle data.
(a(iii))[1]
Determine how many neutrons there are.
(b)[3]
Predict the count rate at 10 am after four more days.
Physics 0625 · IGCSE · Radioactivity
Radioactivity — practice question
Fig. 11.1 shows the particles inside a neutral lithium atom.