WAEC Chemistry 2010 Theory — Question 1

Model answer

Alpha particle, beta particle and gamma ray. Nature/properties of alpha particle: it is represented by ⁴₂α or ⁴₂He; it has a low penetration power; it has a high ionizing power. Properties of beta particle: it is represented by ⁰₋₁β or ⁰₋₁e; it has a moderate penetration power; it has a moderate ionizing power; it is negatively charged, hence it is deflected towards the positive plate in an electric field. Properties of gamma ray: it is represented by ⁰₀γ; it has a very high penetration power; it has a low ionizing power; it is electrically neutral.