Extra Credit Crossword

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Across
  1. 1. Ability of a radioactive emission to pass through matter.
  2. 3. The difference in mass between a nucleus and its component nucleons.
  3. 5. The process of determining the age of an object by measuring the amount of a certain radioisotope remaining in the object.
  4. 6. A reaction in which an atom's atomic number is altered.
  5. 8. The splitting of a nucleus into fragments.
  6. 11. A force that acts on subatomic particles that are extremely close together and overcomes electrostatic repulsion.
  7. 14. Alpha particles being attracted towards a negatively charged plate.
  8. 17. A high-energy radiation that possesses no mass.
  9. 22. Negatively charged particles; Located in the electron cloud.
  10. 23. Positively charged particles located in the nucleus of the atom.
  11. 24. The process by which an unstable atomic nucleus loses energy by radiation.
  12. 25. Neutrally charged particles that are located in the nucleus of the atom.
  13. 27. A form of high-energy electromagnetic radiation.
  14. 28. What protons and neutrons are referred to as.
  15. 30. Radiation Radiation energetic enough to ionize matter with which it collides.
  16. 31. A series of nuclear reactions that begin with an unstable nucleus and result in the formation of a stable nucleus.
  17. 34. Sum of the number of protons and neutrons.
  18. 35. A tiny dense region in the center of an atom where almost all mass is located.
  19. 36. Composed of only one electron producing a 1- charge.
  20. 37. 1 MeV=1.6022*10^-13J
  21. 38. equation that relates mass and energy; e=mc^2.
  22. 39. Energy required to separate an atomic nucleus into its parts.
  23. 40. The area on a graph where all stable nuclei are found.
Down
  1. 2. An isotope of an atom with unstable nuclei.
  2. 4. A unit of mass used to show stomic and molecular weights.
  3. 7. The combining of atomic nuclei.
  4. 9. The time required for one-half of a radioisotope's nuclei to decay into its products.
  5. 10. The process that involves striking nuclei with high-velocity particles.
  6. 12. A change of a radioactive nucleus when bombarded with particles; fission.
  7. 13. Atoms with the same number of protons but different numbers of neutrons.
  8. 15. The difference in mass between a nucleus and its component nucleons.
  9. 16. element Name given to elements with atomic numbers and above.
  10. 18. Contains two protons and two neutrons giving it a 2+ charge.
  11. 19. Beta particles being attracted towards a positively charged plate.
  12. 20. Used to show decay series.
  13. 21. The emission of energy as high-energy particles that cause ionization.
  14. 26. Calculated mass - actual mass
  15. 29. Mega electron-volt
  16. 32. Number of protons in an atom.
  17. 33. The emission of ionizing radiation or particles.