May 29, 2015

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YOUR REVIEW PACKET IS DUE ON MONDAY!!!

Warm-Up:  Friday May 29, 2015:

Match each description with the appropriate type of radiation – alpha, beta, positron, or gamma:

  1. A negatively charged electron.
  2. Blocked only by several feet of concrete.
  3. A positively charged particle stopped by lead.
  4. Blocked by paper or clothing.
  5. Radiation energy with no electrical charge.

 

Write equations for the nuclear decay reactions:

  1. Decay of polonium-218 by alpha (a) emission.
  2. Decay of sodium-22 by electron capture.
  3. Decay of carbon-14 by beta (b-) emission.
  4. Decay of chlorine-32 by positron (b+) emission.
  5. Carbon-14 has a half-life of 5,730 years. If a plant contained 2.0 g of 14C when it died, how much is left after 34,380 years?

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