Semester test vocab , Round three

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Across
  1. 3. displacement reaction where two compounds change partners
  2. 4. in nucleus, no charge
  3. 5. kind of metal,kind of non-metal, on the stairs
  4. 8. metals in the 2nd group of the periodic table
  5. 9. fundamental building block of all matter
  6. 11. in nucleus, is positive
  7. 12. home to positive and neutral particles
  8. 14. metals in the first group of the periodic table
  9. 17. negative particle in atom
  10. 19. full outer shell
  11. 20. substance with a a pH less then 7
  12. 22. substance with a pH more than 7
  13. 23. reaction where two or more elements make a compound
  14. 25. displacement reaction where an element replaces another element ina compound
  15. 27. how group 18 gases are described, full shells
  16. 29. Has mass, takes up space
Down
  1. 1. reaction where compounds breakdown
  2. 2. the name for group 17 elements
  3. 6. algebraic sum of positive and negative particles
  4. 7. process in which plants make there own food from the sun's energy
  5. 10. kind of bond where electrons are shared
  6. 13. sum of protons and neutrons, two words, no space
  7. 15. left side of the periodic table, freely lose electrons
  8. 16. right side of the periodic table, freely gain electrons
  9. 18. quantity that must be conserved during a chemical reaction
  10. 21. bond where electrons are lost and gained
  11. 24. atom unequal protons and electrons
  12. 26. a version of an element, different mass number
  13. 28. outer shell