Chemistry

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Across
  1. 2. how atoms are held together
  2. 7. substance made of one type of atom
  3. 9. anything that takes up space
  4. 10. 2 or more physically combined elements
Down
  1. 1. 2 or more chemically combined elements
  2. 3. an example or a compound
  3. 4. 2 or more chemically combined atoms
  4. 5. how many protons in an element
  5. 6. building blocks
  6. 8. an example of a mixture