Unit B Crossword

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Across
  1. 2. a new substance produced in a chemical reaction between reactants
  2. 6. absorption of heat
  3. 8. most reactive metals
  4. 9. a substance that reacts with another to create a new substance
  5. 10. a slow chemical change that occurs when oxygen reacts with metal
  6. 12. release of heat
  7. 14. consists of a nonmetal and a nonmetal
  8. 15. the most stable and nonreactive nonmetals
  9. 16. a subatomic particle with a negative charge
  10. 17. a subatomic particle with a positive charge
  11. 20. earth metals, less reactive than alkali
  12. 21. an irreversible reaction
  13. 22. when oxygen reacts with another substance to form a new substance that gives off energy
  14. 23. chemical combination of 2 or more elements
  15. 24. anything on the periodic table
Down
  1. 1. substances that speed up the reaction rate
  2. 3. can be in between metals and nonmetals
  3. 4. a chemical reaction in your body
  4. 5. a subatomic particle found in every nucleus, except for hydrogen
  5. 7. consists of a metal and a nonmetal
  6. 11. average mass of an element
  7. 13. made up of one type of matter
  8. 16. organic catalyst
  9. 18. most reactive non metals
  10. 19. the number of protons of an atom, determines its place on the periodic table