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Across
  1. 2. is a reaction that can escape
  2. 3. is solids at room temperature
  3. 10. the number of protons and atom has
  4. 11. is the most stable and unreactive
  5. 14. made up of two or more substances
  6. 18. when two or more substances react to form a new substance
  7. 19. is a reaction occurred in one area
  8. 22. have both metal and non metal properties
  9. 23. 4
  10. 24. 5
  11. 25. a new substance produced in a chemical formula
Down
  1. 1. is an atom that has lost one or more electrons
  2. 4. a chemical change which absorbs heat energy
  3. 5. a chemical change which releases heat energy
  4. 6. a substance that reacts with another substance
  5. 7. when a material changes state
  6. 8. is liquids or gases at room temperature
  7. 9. are the most reactive especially in air or water
  8. 12. made up of one type of matter
  9. 13. 1
  10. 15. 3
  11. 16. is an atom that has gained one or more electrons
  12. 17. is the most reactive non metal
  13. 20. 6
  14. 21. 2