Chemistry

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Across
  1. 1. what is formed after a chemical reaction
  2. 4. conductor of electricity can be melted
  3. 6. the mass of an atom
  4. 8. great stability and low reaction rates
  5. 11. mass stays the same after a chemical reaction
  6. 15. basic substance made of atoms
  7. 17. developed periodic table
  8. 19. two or more elements to combine
  9. 21. horizontal row
  10. 22. part of the nucleus and has no charge
  11. 23. smallest possible substance
  12. 25. putting a thin layer of metal over something
Down
  1. 2. changes when combined
  2. 3. central part of an atom
  3. 5. tells how many protons are in an atom
  4. 7. travels around nucleus and has negative charge
  5. 9. the electron in the outer most orbital
  6. 10. part of the nucleus has a positive charge
  7. 12. produces heat
  8. 13. lacks characteristics of a metal
  9. 14. abbreviation of an element
  10. 16. absorbs heat
  11. 18. between a metal and a nonmetal
  12. 20. smallest unit of any amount of matter
  13. 24. ring of an atom
  14. 26. column