A proton and an α\alphaα-particle have the same kinetic energy. Why does the α\alphaα-particle have a stronger ionizing effect than the proton as it passes through a gas?
The α\alphaα-particle has a larger charge and a larger velocity, so it is near a gas atom for a shorter time.
The α\alphaα-particle has a smaller charge and a smaller velocity, so it is near a gas atom for a longer time.
The α\alphaα-particle has a larger charge and a smaller velocity, so it is near a gas atom for a longer time.
The α\alphaα-particle has a smaller charge and a larger velocity, so it is near a gas atom for a shorter time.
134 exam-style questions on CIE IGCSE Physics 5.2.2a Alpha, beta and gamma emission. Each one has a worked solution and a mark scheme showing where the marks go.