CH 9 and CH 10 Crossword

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Across
  1. 2. radiation particle that travels at the speed of light
  2. 3. the rays and particles emitted by a radioactive source are
  3. 4. Used to get the approximate age of plants
  4. 6. pH stands for the power of ______
  5. 10. the amount of material needed to sustain a chain reaction
  6. 12. increase hydronium atoms when dissolved in water
  7. 13. the smallest of the radiation particles
Down
  1. 1. process of nuclear (nucleus) decay
  2. 5. two nuclei of smaller mass are combined to form one larger nucleus
  3. 6. the amount of time it takes for half of the nuclei in a sample of an isotope to decay
  4. 7. increase hydroxide ions when dissolved in water
  5. 8. The process of splitting a nucleus into several smaller nuclei
  6. 9. a substance that conducts electricity when dissolved in water
  7. 11. animals up to 50,000 years