Chemistry Crossword Final Project (MM)

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Across
  1. 4. a change of one or more substances into new substances
  2. 5. a reaction in which a compound breaks down into two or more simpler substances
  3. 7. a strong base
  4. 9. an electron in the outermost energy level of an atom; electrons that are gained or lost to form ions
  5. 13. in a covalent compound, electrons are ____ between two atoms
  6. 15. group 17 nonmetal
  7. 17. an indicator solution that is clear in acids and neutral solutions, but turns pink in basic solutions
  8. 18. a substance that changes color in the presence of acids or bases
  9. 20. indicator paper that turns red in the presence of acids or blue in the presence of bases
  10. 21. a reaction in which two or more reactants combine to form a single product
  11. 22. chemical reaction that absorbs energy
  12. 23. any compound that conducts electricity when melted or dissolved in water
  13. 24. in an ionic compound, electrons are ____ from the metal to the nonmetal
  14. 28. a number placed in front of the substances of a chemical equation to indicate how many are involved
  15. 34. ____ acids and bases are found at the far ends of the pH scale
  16. 35. ____ acids and bases are found towards the middle of the pH scale
  17. 36. a type of compound that contains nonmetals only
  18. 39. a substance that undergoes a chemical change
  19. 40. a reaction in which a hydrocarbon reacts with oxygen to produce carbon dioxide and water
  20. 42. a strong acid
  21. 43. a type of element that loses electrons to form an ion
Down
  1. 1. a substance that produces hydroxide ions when dissolved in water
  2. 2. Group 1 metal
  3. 3. an organic compound that consists of hydrogen and carbon
  4. 6. atoms gain or lose electrons to become ___
  5. 8. a displacement reaction in which the positive and negative portions of two ionic compounds are interchanged
  6. 10. a number used to indicate how many atoms of a given element are in a compound
  7. 11. a scale from 0 to 14 that measures the strength of acids and bases
  8. 12. an ion that consists of two or more different elements
  9. 14. Group 2 metal
  10. 16. the smallest particle of an element
  11. 19. a type of element that gains electrons to form an ion
  12. 25. Group 18 element with a full valence shell
  13. 26. a substance that produces hydrogen ions when dissolved in water
  14. 27. a displacement reaction in which one element takes the place of another in a compound
  15. 28. a positive ion
  16. 29. a type of compound formed between a metal and a nonmetal
  17. 30. chemical reaction that releases energy
  18. 31. a combination of chemical symbols that show what elements make up a compound and the number of atoms of each element
  19. 32. a chemical combination of two or more different elements
  20. 33. rule that states that atoms become stable by having eight electrons in their outer energy level
  21. 37. a new substance formed when substances undergo a chemical change
  22. 38. a negative ion
  23. 41. an atom or group of atoms that has a charge because of the loss or gain of electrons