Radioactive Decay

Radioactive Decay problem 1

A radioactive source emits radiation that can pass through a sheet of paper but not through thick aluminium.

What does this show about the radiation?

  • It is alpha-particles.

  • It is beta-particles.

  • It is gamma-rays.

  • It is a mixture of alpha-particles and gamma-rays.


main author and content editor: Joanah Frank