Gabriella Sansaricq Extra Credit #1

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Across
  1. 2. smallest amount of matter that retains chemical properties, pure substance
  2. 4. is the sum of the neutrons and protons
  3. 6. number of decays per second in a radioactive substance
  4. 7. nucleus of an isotope
  5. 11. the number of protons in an atom's nucleus
  6. 13. positively charged pieces of the nucleus
  7. 14. radioactive decay where alpha particles are emitted
  8. 15. nuclei with small masses combined into one big nucleus and energy is released
  9. 16. neutrally charged pieces of the nucleus
Down
  1. 1. each of differing forms of same atom with different masses but same chemical properties
  2. 3. materials that undergo decay and emit penetrating rays
  3. 5. a nucleus is divided in two or more fragments, neutrons and energy are released
  4. 8. negatively charged pieces of the nucleus
  5. 9. the atom's atomic _____ is measured in amu's
  6. 10. elements joined in a chemical bond
  7. 12. energy equivalent to the mass defect
  8. 14. unit of mass that is equal to 1.66*10^-27 kg