Chapter 3 Vocab

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Across
  1. 3. an arrangement of elements that show the repeating pattern of their properties
  2. 7. group 17, most reactive substances on the table
  3. 8. a molecule made up with two atoms of the same nonmetal element
  4. 12. these metals are group 2, the second most reactive of all metals
  5. 15. elements in group 18, least reactive group on the table
  6. 16. elements that are good conductors of electric current and heat
  7. 18. ____________ conductivity is the ability of an object to carry electric current
  8. 22. positively charged particle found in the nucleus of an atom
  9. 24. substances that can conduct electric current under some conditions but not under other conditions
  10. 27. small region in the center of an atom that contains protons and neutrons
  11. 28. elements that lack most of the properties of metals
  12. 30. the ease and speed with which an element combines, or reacts, with other substances
Down
  1. 1. metals of group 1, most reactive of all metals
  2. 2. the smallest particle that can still be considered an element
  3. 4. how shiny and/or reflective a material is
  4. 5. when a material can be hammered or rolled into flat sheets or other shapes
  5. 6. vertical columns on the periodic table that contain elements with similar properties
  6. 9. a one or two letter abbreviation for an element's name
  7. 10. elements in groups 3 through 12
  8. 11. the number of protons in the nucleus of an atom
  9. 13. ________ conductivity is the ability of an object to transfer heat
  10. 14. elements with some properties of metals and some properties of nonmetals
  11. 17. when a material can be pulled out, or drawn into wire
  12. 19. horizontal rows on the periodic table where the properties of elements change in a predictable way
  13. 20. atoms with the same number of protons, but different number of neutrons
  14. 21. negatively charged particles found outside of the nucleus
  15. 23. the sum of the protons and neutrons in an atom
  16. 25. these elements include all elements that come after uranium
  17. 26. the deterioration of a metal due to a chemical reaction in the environment
  18. 29. the average mass of all the isotopes of an element