Chemistry Review

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Across
  1. 2. any substance that forms hydroxide ions (OH-) in a water solution
  2. 4. solid turning into gas
  3. 7. the number of electrons that are required to have a stable outer electron shell
  4. 8. trioxide, N2O3
  5. 11. tell you how many atoms of the element are contained in that compound
  6. 14. fluoride, NaF
  7. 16. variable, variable that is measured or observed
  8. 17. covalent, bonding with equal sharing of electrons
  9. 19. factor that does not change when the other variables change
  10. 20. have a fixed volume and a fixed shape
  11. 23. reaction, a hydrocarbon reacts with oxygen gas
Down
  1. 1. positively charged ion
  2. 3. the atomic number of carbon
  3. 5. bond, formed when electrons are gained or lost in order to produce a stable ion
  4. 6. the number of neutrons in chlorine
  5. 9. when atoms of the same element have different numbers of neutrons
  6. 10. the number of valence electrons that fluorine has
  7. 11. method, an organized set of investigation procedures that scientists use to investigate a question that they have about the world
  8. 12. theory, explains how a natural phenomenon works and is supported by scientific evidence
  9. 13. positively charged particles in the nucleus of an atom
  10. 15. metals, group 1 on the periodic table
  11. 18. replacement reaction, when one element in a compound is replaced with the other single element
  12. 21. the smallest piece of matter that forms an element
  13. 22. gases, group 8 on the periodic table
  14. 24. graph, used to show the comparison between categories, groups, or types of similar things