Shelby Decker block 3 4/26/16
Speed- 15,000 km/s
Type of material- sheet of paper
Subatomic- particles if anyl making up the radioactive particle. The alpha particle is an helium atom and contains two neutrons and two protons.
Description of how nucleus is changed- Alpha particles carry a charge of +2. An alpha particle is a fast moving packet containing two protons and two neutrons (a helium nucleus) Produced during alpha decay.
Speed of particle- speed of light
Type of material- a block of lead