Topic: Radioactive Particles Do Now: Stable or Radioactive? 1. Th-234 2. U-238 3. Ca-40 4. Ra-226.
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Topic: Radioactive Particles Do Now: Stable or Radioactive? 1. Th-234 2. U-238 3. Ca-40 4. Ra-226
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Transcript of Topic: Radioactive Particles Do Now: Stable or Radioactive? 1. Th-234 2. U-238 3. Ca-40 4. Ra-226.
Topic: Radioactive Particles
Do Now: Stable or Radioactive?1. Th-2342. U-2383. Ca-404. Ra-226
Transmutation-When an element turns into a different element by emitting a radioactive particle. This occurs when the number of protons changes.
Radioactivity – Rutherford again!
Penetration & Shielding
Alpha particles have the least penetrating power
Gamma waves have the greatest penetrating powwer
Turn to table 0
• Add column for mass
2 Neutrons & 2 Protons
Charge = +2Mass = 4amu
42He
Beta Particle – fast moving electron
Charge = -1Mass = 0amu
Gamma Wave
Charge = 0Mass = 0
PositronPositive beta particle
Mass 0Charge +1
These subatomic particles that are emitted were discovered around 1900
• Alpha rays• Beta rays• Gamma rays
