Chemistry

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Across
  1. 1. divided by volume
  2. 3. for water
  3. 5. smallest unit of an element
  4. 6. of bond where electrons are shared
  5. 8. charged particle
Down
  1. 2. made of two or more elements
  2. 4. of matter with no fixed shape
  3. 7. less than 7
  4. 8. of protons in an atom
  5. 9. that organizes elements