chemistry

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Across
  1. 3. metalic and non-metalic
  2. 6. metal and non-metal
  3. 8. combination of symbols that represent a compound
  4. 10. horizontal rows on the periodic table
  5. 11. how much an atom weights(amu)
  6. 12. positively charged particals
  7. 13. non-reversible
  8. 17. vertical columns on the periodic table
  9. 18. new substance
  10. 20. reversible
  11. 23. neutral partical in the nucleus of an atom
  12. 24. substances that react with another
Down
  1. 1. group 17 on the periodic table
  2. 2. the number of protons
  3. 4. group 18 in the periodic table
  4. 5. non-metal and non-metal
  5. 6. lost or gain of electrons
  6. 7. cloudy mixture, cannot be separated
  7. 9. absorbs heat
  8. 14. gas or liquid
  9. 15. negative charge
  10. 16. pure substances
  11. 19. workplace hazardous materials info system
  12. 21. combination of two or more elements
  13. 22. releases heat