Chemistry

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