Logan York's Crossword 3rd Block

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Across
  1. 2. What radiation has no charge
  2. 3. What radiation has a negative charge
  3. 6. What type of radiation is helium
  4. 8. Who made the equation E=mc2
Down
  1. 1. What radiation has the most penetrating rays
  2. 4. What radiation has a positive charge
  3. 5. what is the rate of decay of radioactive isotope
  4. 7. what is called when the atoms react to each other