Compared with an alpha particle, a beta particle has a smaller mass, although the speed of a beta particle released in radioactive decay is about $20$ times the speed of an alpha particle. Which statement gives the correct comparison between the properties of these two particles?
- AAlpha particles are less penetrating because they have less kinetic energy than beta particles.
- BAlpha particles are more penetrating because they have less kinetic energy than beta particles.
- CAlpha particles are less ionising because they have more kinetic energy than beta particles.
- DAlpha particles are more ionising because they have more kinetic energy than beta particles.