Chemistry Crossword!!!

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Across
  1. 5. Compound formed when two nonmetals combine
  2. 10. a system in which the products can escape
  3. 13. characteristics used to describe a substance
  4. 14. created the organization for the periodic table of elements
  5. 15. A compound that is created by combing a metal and non-metal
  6. 16. the substances that start the reaction
  7. 17. the orbit of electrons around a nucleus in an atom
  8. 18. the 7 horizontal rows in the periodic table
  9. 19. elements with metal and non metal properties
  10. 20. a chemical reaction that is formed when oxygen reacts with a substance that gives off energy
  11. 23. Element that is brittle before heated
  12. 24. matter going from a solid to liquid
Down
  1. 1. An Organic Catalyst
  2. 2. These chemists wrote the first chemistry text and created beakers and other lab equipment
  3. 3. Found in the 18th group on periodic table of elements
  4. 4. stands for workplace hazardous material information system
  5. 6. a physical property found in metals and carbon
  6. 7. Number that represents number of electrons and protons in one atom of elements
  7. 8. A higher_________ creates a faster reaction rate
  8. 9. Another word for a mechanical mixture
  9. 11. Comes from the Greek word meaning juice of a plant
  10. 12. the amount of mass in a given volume
  11. 17. A chemical reaction that releases heat
  12. 21. anything with mass or that occupies space
  13. 22. Subatomic particles that are neutrally charged