PS 12/7

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Across
  1. 3. the smallest particle of an element that retains the element’s properties
  2. 5. A heterogeneous mixture made of a liquid and solid particles that settle (salad dressing).
  3. 7. the horizontal rows on the periodic table numbered 1-7
  4. 8. the table of all known elements arranged by increasing atomic number
Down
  1. 1. A heterogeneous mixture with particles that never settle (oobleck).
  2. 2. the vertical columns in the periodic table numbered 1-18
  3. 4. a substance made up of atoms that are all alike (Oxygen).
  4. 6. a substance in which the atoms of two or more elements are chemically combined in proportion (NaCl/table salt).