chemistry

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Across
  1. 4. attraction of molecules
  2. 5. smallest part of a substance
  3. 7. change does not change composition
  4. 8. branch of science
  5. 11. takes up space, weight
  6. 12. atoms bonded together
  7. 15. moves heat, work
  8. 16. come together to make new chemical
  9. 17. measure matter
  10. 18. change change composition
Down
  1. 1. property no chemical change
  2. 2. sped up, no chemical change
  3. 3. force that holds atoms together
  4. 6. releases heat
  5. 9. substance mixed
  6. 10. amount of space
  7. 13. absorbs heat
  8. 14. one atom, contains protons