Chemistry 4th Quarter Exam Review #2

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Across
  1. 3. Which kind of electromagnetic radiation carries the highest amount of energy (has the shortest wavelength)?
  2. 6. You should be able to calculate the ___ atomic mass given the isotopic data for an element.
  3. 7. The ___ Mechanical Model describes the motion of small particles confined to tiny regions of space.
  4. 10. As photon wavelength decreases the photon’s energy increases.
  5. 11. What phase is nitrogen (N, 7) at standard temperature and pressure?
  6. 12. Thomson destroyed the concept of an indivisible atom when he discovered the ___ (later to be called the “electron”).
  7. 16. The solid that forms when two clear solutions are mixed together.
  8. 18. What is the first element in the group represented by VIA?
  9. 19. In the equation used to calculate the energy in light photons, what does “c” represent?
  10. 23. Special name for Group 1 elements.
  11. 25. Which scientist gave us the idea of a nucleus and an atom that was filled with mostly empty space?
  12. 27. Which kind of electromagnetic radiation has the longest wavelength (carries the lowest amount of energy)?
  13. 28. As photon wavelength increases the photon’s ___ decreases.
  14. 29. What major element category does boron (B, 5) fall within?
  15. 31. Which scientist developed the Plum Pudding Model from his study of cathode ray tubes?
  16. 32. You should be able to draw Bohr models and write ___ dot structures for the exam.
Down
  1. 1. Special name for Group 17 elements.
  2. 2. What does the Greek letter delta (looks like a triangle) mean?
  3. 4. Mass is divided by volume to calculate ___ for an object or material and you should be able to do this for the exam.
  4. 5. Which scientist thought the atom was a small indivisible and solid piece of matter?
  5. 8. One of the elements that occurs as a liquid at standard temperature and pressure.
  6. 9. We use the water ___ method to measure the volume of irregularly shaped objects and you be able to do this for the exam.
  7. 13. ‘aq’ in "NaCl(aq)" means ___ and tells us the substance is dissolved in water.
  8. 14. The 3-D shape of an “s” orbital.
  9. 15. Number of valence electrons in all atoms of Group 15 elements.
  10. 17. Which scientist gave us the idea of orbits and described how light is generated by the atom?
  11. 19. An isotope ___ contains the element symbol, mass number and atomic number.
  12. 20. For two or more atoms to be ____ of a certain element they must have the same atomic number and they must have different mass numbers.
  13. 21. The Greek letter lambda (upside-down walking “y”) represents ___.
  14. 22. The percent ___ is used to express the difference between a measurement and its accepted value and you should be able to do this for the exam.
  15. 24. You should be able to “read” electron configurations and ___ diagrams for the exam.
  16. 26. Within which category do most elements fit?
  17. 30. An electron gains energy and moves to a higher energy orbit when it ___ energy.