Science

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Across
  1. 5. -
  2. 7. Atoms not chemically combined
  3. 8. Building Blocks
  4. 9. 2+ different atoms chemically combined
  5. 10. How large an atom is
Down
  1. 1. o
  2. 2. Bigger than Atoms
  3. 3. +
  4. 4. Chemically Combining Atoms
  5. 6. A group of same atoms