Chemistry

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Across
  1. 4. the number of protons in the nucleus of an atom
  2. 5. workplace hazardous materials information system
  3. 8. change in appearance or state
  4. 9. when a gas changes to a solid
  5. 11. the mixture of magic and chemistry
  6. 13. can eat away or corrode
  7. 15. when non-metal combine
  8. 16. mixture of two or more pure substances that look like one substance
  9. 18. the mass of all protons and neutrons in an atom
  10. 19. ability to conduct electricity or heat
  11. 22. made up of one type of matter
  12. 23. chemical reaction that absorbs heat energy
  13. 25. substances in a reaction
Down
  1. 1. contaminated material that is a threat to humans and health
  2. 2. the center of an atom
  3. 3. when a solid changes to a gas
  4. 6. mixture in which the different substances are visible
  5. 7. when a new substance is formed and non-reversible
  6. 10. pure substance that cannot broken down any further
  7. 12. chemical reaction that releases heat energy
  8. 14. a compound of a metal and non-metal
  9. 17. electrically charged atoms
  10. 20. can be in between metals and non-metals
  11. 21. shiniest of a substances,
  12. 24. the horizontal rows on the periodic table