Chemistry

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Across
  1. 6. a mixture that is not consistent throughout
  2. 9. helps you calculate the amount of neutrons
  3. 10. consistent throughout the mixture
  4. 11. something that can be undone without chemical means.
  5. 12. atomic symbol Ag
  6. 14. a chemical combination of 2 hydrogen and 1 oxygen
  7. 15. atomic symbol B
Down
  1. 1. a gas in group 1
  2. 2. a letter that abbreviates an element
  3. 3. a homogeneous mixture of two or more pure substances
  4. 4. noble gas, element with the lowest boiling point
  5. 5. the study of matter
  6. 7. the electron(s) farthest from the shell
  7. 8. a tool used in chemistry
  8. 13. atomic number