Chemistry Review

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Across
  1. 3. When 2 or more elements come together and bind chemically.
  2. 7. Has an atomic mass of 12.011.
  3. 8. Published the first periodic table in which the elements are arranged by atomic.
  4. 10. Used gold foil experiment to determine that most of an atom's mass is in the nucleus.
  5. 11. Property that can be observed by the 5 senses.
  6. 13. An amount equal to 6.02 x 10^23.
  7. 14. Type of physical property that does not depend on the amount of mass of a substance.
  8. 15. Type of mixture that cannot be easily separated such as Kool-aid, generally a solution.
  9. 18. Variations of an element with different numbers of neutrons.
  10. 21. Dull, brittle, most are gases, poor conductors of heat and electricity.
  11. 24. Horizontal rows of elements on the periodic table.
  12. 25. 2 or more molecules or elements chemically bound to each other and can only be changed by a chemical reaction.
  13. 26. Change that results in new compounds.
  14. 29. Slightly compressible, atoms slide past one another--no fixed shape, but does have a fixed volume.
  15. 30. A group of elements with the same number of valence electrons, and similar characterics including reactivity.
  16. 33. Establishes identity of the element.
  17. 36. The densely packed middle of an atom.
  18. 38. Has the atomic symbol Xe.
Down
  1. 1. Hypothesized that electrons traveled in discrete orbits around the nucleus.
  2. 2. A physical property defined at mass/volume and has units of g/ml org/cm^2.
  3. 4. Negative particle of an atom.
  4. 5. Family with 3 valence electrons.
  5. 6. Type of mixture that can be easily separated such as chunky peanut butter, or stew.
  6. 9. Many data points that are closely grouped together.
  7. 12. The combination of 2 or more substances that does not result in a chemical change.
  8. 13. Good conductor of heat and electricity, malleable, shiny.
  9. 15. Family with an oxidation number of -3.
  10. 16. Type of physical property that depends on the amount of mass of a substance.
  11. 17. Compressible, atoms move quickly and have a large amount of space between them--no fixed shape or volume.
  12. 19. Not compressible, atoms are closely packed and only move slightly--has a fixed shape and volume.
  13. 20. What goes into a chemical reaction.
  14. 22. Found on the periodic table and cannot be separated out to a more pure form.
  15. 23. Attaining the intended target.
  16. 25. Has an atomic number of 17.
  17. 27. A positive ion.
  18. 28. The result of a chemical reaction.
  19. 31. An element that has lost or gained electrons.
  20. 32. Vertical columns of elements on the periodic table.
  21. 34. Has the atomic symbol Na.
  22. 35. Discovered the modern periodic table.
  23. 37. A negative ion.