Elements

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Across
  1. 6. yellow triangle
  2. 8. H2O
  3. 10. luster
  4. 11. physical and ______ changes
  5. 13. orange diamond
  6. 14. red octagon
  7. 15. may cause life threatening effects even in small amounts and with short exposure
  8. 16. chemical combination of two or more elements in a specific ratio
  9. 18. mixtures that can be separated
  10. 21. hazardous household products symbols
  11. 24. mixtures that cannot be separated
  12. 25. made up of only one type of atom
Down
  1. 1. mass number minus atomic number
  2. 2. amount of mass in a given volume
  3. 3. may cause skin burns and permanent eye damage
  4. 4. made up of two or more substances and can be separated
  5. 5. solids at room temperature
  6. 7. can burn without air or can intensely combustible material
  7. 9. can be between metals and non metals
  8. 12. most reactive non-metals
  9. 17. often a liquid or gas at room temperature
  10. 19. able to dissolve into another
  11. 20. Br
  12. 22. all compounds have a name and a _____
  13. 23. shapes and______indicate how dangerous a substance is