Some substances are radioactive. they may emit Alpha or Beta particles.
describe the characteristics of Alpha and Beta particles in terms of their:
- Structure
- penetration through air and other materials
-deflection in a electrical field.

Alpha Particles:

Slow and heavyLow penetrating power (can be stopped with a sheet of paper)Large charge (ionize electrons from atoms strongly)Have two protons and neutrons

Beta Particles:

Fast and lightMedium penetrating power (can be stopped with aluminum or plastics)Charge not as strong as alpha particles (they ionize atoms that they pass by)Same mass and charge as electrons