Exploration Station

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Across
  1. 3. same group of atoms
  2. 6. anything that takes up space
  3. 7. what we breathe
  4. 8. chemically bonded
  5. 9. table: 118 elements organized
Down
  1. 1. atoms held together by chemical bonds
  2. 2. H2o
  3. 4. mostly made of iron
  4. 5. dioxide: Co2
  5. 6. physically pushed together