(a(i))[1]
State the name of particle X.
(a(ii))[1]
State the charge of particle X.
(a(iii))[1]
Tick one box in Fig. 12.2 which correctly shows an isotope of lithium.
(b)[2]
Calculate the mass of the isotope left after 2 half-lives.
Physics 0625 · IGCSE · Radioactivity
Radioactivity — practice question
Fig. 12.1 shows the particles in an atom of lithium. A neutron and another particle X are labelled, and electrons are shown on orbits. Fig. 12.1 is not to scale.