Semester 1 Exam Topics

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Across
  1. 4. found in the middle of the periodic table
  2. 7. found in group 1 of the periodic table (1 valence electron, 1+ charge)
  3. 10. the number of wavelengths that occur in a certain amount of time
  4. 13. prefix that means 1/100th
  5. 17. negatively charged ion that wants to gain electrons to become stable
  6. 18. positively charged particle in the nucleus of an element (1+)
  7. 22. the distance from origin line to crest or trough (how tall)
  8. 24. _______________ analysis: start with the given number, set up units diagonally so they cancel out until you get to the unit you need for the answer
  9. 25. number of electrons in the outer shell of an atom (group A number tells you how many valence electrons the elements in that group have)
  10. 27. ___________ and frequency are inversely proportional (when one increases the other decreases)
  11. 28. found on the left and middle of the periodic table mostly in groups 1-12
  12. 30. tells us what elements are present in a substance, each element has its own pattern of lines
  13. 34. the bottom of the wave
  14. 36. when data points are close to each other
  15. 37. an atom with an equal number of positive protons and negative electrons
  16. 38. found in group 18(8A) of the periodic table, most stable and nonreactive elements (8 valence electrons, 0 charge)
  17. 40. positively charged ion that wants to lose electrons to become stable
  18. 42. the top of the wave
  19. 44. negatively charged particle that moves around the nucleus of an atom (1-)
  20. 45. number of figures (numbers) in a value that are significant (based on the lowest number of figures from the original numbers in a problem)
  21. 46. mass divided by volume, elements with a larger mass usually have a higher __________
Down
  1. 1. a reaction in which the nucleus of an atom splits into two or more smaller nuclei.
  2. 2. number of protons in an element
  3. 3. metals found in group 2 of the periodic table (2 valence electrons, 2+ charge)
  4. 5. when data points are close to the accepted value
  5. 6. anything that has mass and takes up space
  6. 8. found along the stair step line mostly in groups 13-16
  7. 9. prefix that means 1,000 times
  8. 11. a pure substance made of two or more elements chemically bonded
  9. 12. a mixture in which the composition is uniform throughout the mixture ex: coffee
  10. 14. the distance between crests or troughs of a wave (how wide)
  11. 15. numbers written with a number between 1-10 multiplied by a power of 10 (1.5 x 105)
  12. 16. a mixture in which the composition is not uniform throughout the mixture ex: cereal
  13. 19. A pure substance made of only one type of atom that cannot be broken down
  14. 20. an atom that has lost or gained electrons and therefore has a charge
  15. 21. found in group 17(7A) of the periodic table (7 valence electrons, 1- charge), highly reactive
  16. 23. counting the number of electrons in the energy levels of an atom ex: 1s2 2s2 2p6 3s2
  17. 26. rings/energy levels around the nucleus of an atom (s can hold 2 electrons, p hold 6, d hold 10, f hold 14)
  18. 29. number at the top of a group/family/column on the periodic table
  19. 31. found in the far right of the periodic table mostly in groups 14-18
  20. 32. when measuring _________ of a liquid, read the bottom of the meniscus (curve)
  21. 33. a reaction in which the nuclei of two atoms join to form a larger nucleus
  22. 35. particle in the nucleus with no charge (0)
  23. 39. protons + neutrons, mass of one atom of an element
  24. 41. the size of the atom, largest in elements towards the bottom left of the periodic table
  25. 43. used with units to indicate multiplication or division by a certain amount, ex: kilo= 1,000 times, centi= 1/100th