(a)[3]
Complete Table 11.1 for the neutral atoms of these helium isotopes.
(b)[3]
State and explain any form of radiation that can pass through the aluminium foil.
Physics 0625 · IGCSE · Radioactivity
Radioactivity — practice question
Hydrogen-1 is the isotope with proton number 1 and nucleon number 1. The helium isotopes are helium-3 and helium-4. For helium-3, the proton number is 2 and the nucleon number is 3. For helium-4, the nucleon number is 4.