Chemistry Unit Vocabulary Review

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Across
  1. 1. found in nucleus, positive charge
  2. 4. conductive, shiny, easily shaped
  3. 6. The vertical columns that contain elements on the periodic table; have similar chemical properties
  4. 10. Electrons found in the outer energy level of the electron cloud, responsible for chemical properties
  5. 11. One or two letter combination that represents an element.
  6. 13. A solid separated from a solution
  7. 14. Ability to pass heat or electricity
  8. 17. "energy levels" where electrons orbit at specific distances from the nucleus
  9. 18. Center of an atom that has the protons and neutrons
  10. 21. found in nucleus, no charge
  11. 22. found outside nucleus, negative charge
  12. 23. Ability to be pulled into a wire
  13. 25. State of matter composed of freely moving molecules capable of indefinite expansion
  14. 26. Chemical reaction that releases heat-gets warmer during the reaction
  15. 27. Basic substance that cannot be broken down into smaller parts
  16. 29. The smallest unit of an element (building block of all matter!)
  17. 31. has properties of both metals and non metals
  18. 34. The atoms or molecules on the right side of a chemical equation; the new substance that is formed
  19. 36. A mixture that is uniform throughout (salt water)
  20. 38. The large number in front of a chemical symbol in a chemical formula
  21. 41. first group on periodic table most reactive, one valance electron
  22. 42. Allows portion of the gases or atoms to escape during an experiment. (no lid) Reactants may be heaver than product due to some escapeing as a gas.
  23. 45. 7th group on the periodic table 7 valance electrons
  24. 46. The horizontal rows that contain elements on the periodic table; arranged by atomic number
  25. 47. Color, harness, boiling point, state of matter, anything that can be observed without changing it.
Down
  1. 2. Protons Positive Neutrons Neutral and Electrons negative
  2. 3. Group 18 on the periodic table, non reactive
  3. 5. Protons plus the neutrons
  4. 7. Shininess
  5. 8. Chemical reaction that absorbs heat-gets colder during the reaction
  6. 9. State of matter composed of tightly packed molecules
  7. 11. Keeps all the atoms in a closed container, the reactants will always equal product
  8. 12. The principle states that matter cannot be created or destroyed in a closed system (atoms may be rearranged)
  9. 14. When a chemical change occurs and forms a new substance
  10. 15. The atoms or molecules on the left side of a chemical equation that you begin a chemical reaction with
  11. 16. A mixture that is not uniform throughout (sand)
  12. 19. Ability to be hammered, pressed, or rolled into a shape
  13. 20. Number of protons in an atom; determines the type of element
  14. 24. not conductive, gas at room temperature (usually)
  15. 28. State of matter composed of freely moving molecules that do not usually separate
  16. 30. the small number on the bottom right side of a chemical symbol. (acts like an exponent)
  17. 32. second group on the periodic table very reactive
  18. 33. A symbolic representation of one set of compounds reacting together to form a new set of compounds
  19. 35. Characteristic that is observed during a chemical reaction.
  20. 37. A chemical substance composed of two or more atoms of different elements
  21. 39. A compound that includes carbon and is essential for any living thing
  22. 40. A chart illustrating chemical elements that compose all physical matter; listed by atomic number and related groups
  23. 43. How much a chemical reaction can produce, shown by an arrow
  24. 44. A group of atoms bonded together, often representing the smallest unit of a compound