Exam 4 (Topics 9-11) Extra Credit Crossword

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Across
  1. 3. high-frequency electromagnetic radiation emitted by radioactive elements
  2. 4. product of radioactive decay, combination of two protons and two neutrons
  3. 5. where we engineer materials by manipulating individual atoms
  4. 7. product of radioactive decay, an electron ejected from a nucleus
  5. 10. the study of matter and the transformations it can undergo
  6. 12. the force of attraction between two atoms that holds them together
  7. 13. any material made of only one type of atom
  8. 15. when atoms of different elements bond to one another
  9. 19. the element’s fingerprint
  10. 21. the horizontal row in the periodic table, shows periodic trend
  11. 23. masses greater than a certain amount that might cause and explosion of an enormous magnitude
  12. 25. sum of all the masses of the atom’s components
  13. 26. the vertical column in a periodic table, element properties are similar
  14. 27. changing of one chemical element to another
  15. 28. subatomic particle with same mass of proton, but no charge
  16. 30. properties that describe the look or feel of a substance
  17. 31. fusion brought about by high temperatures
  18. 33. some atoms link together to form larger units
  19. 35. detects and characterizes the surface atoms of materials by way of an ultrathin probe tip
Down
  1. 1. the way a fundamental unit of an element is indicated
  2. 2. if elongation passes a certain point, electric forces overwhelm the strong nuclear force and the nucleus splits
  3. 6. any change in a substance that involves a rearrangement of the way atoms are bonded
  4. 8. all elements are listed in this chart
  5. 9. characterize the ability of a substance to react with other substances or to transform from one substance to another
  6. 11. an instrument used to observe the color components of any light source
  7. 14. where protons and neutrons are found
  8. 16. beyond the microscopic level
  9. 17. a self-sustaining reaction in which the products of one reaction event stimulate further reaction events
  10. 18. change when a substance changes its phase or some other physical property, but not its chemical composition
  11. 20. attraction that acts between all nucleons
  12. 22. elements with unstable nuclei
  13. 24. subatomic particle with positive charge and is relatively heavy
  14. 29. when nuclei combine, the opposite of nuclear fission
  15. 32. atoms of the same element that contain different numbers of neutrons
  16. 34. a region of space around the atomic nucleus within which electrons may reside