periodic table

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Across
  1. 3. a substance that is in a gaseous, or vaporous, state of matter
  2. 5. a substance that flows freely but is of constant volume, having a consistency like that of water or oil.
  3. 6. element with atomic number 8
  4. 7. name for group 18 elements
  5. 10. name for group 17 elements
Down
  1. 1. name for group 1 elements
  2. 2. a horizontal row of the periodic table
  3. 4. element with atomic number 1
  4. 8. a vertical column on the periodic table
  5. 9. firm and stable in shape; not liquid or fluid.