Periodic Table

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Across
  1. 2. matter made up of one kind of atom
  2. 4. Table salt contains the elements of sodium and ___________
  3. 5. Group 1 of the periodic table includes these metals
  4. 9. small particle in the nucleus that does not have a charge
  5. 11. non-metallic elements in group 17 that have color
  6. 13. element found in all living things
  7. 14. ______ gases make up group 18 of the periodic table
  8. 16. negatively charged particle that moves around the outside of an atom
  9. 18. a horizontal row of elements on periodic table
  10. 19. Number number of protons in the nucleus
  11. 20. Name for metals in groups 3-12 on periodic table
Down
  1. 1. he developed the original periodic table
  2. 3. Earth metals found in Group 2 of the periodic table
  3. 6. positively charged particle found in nucleus of atom
  4. 7. Number elements on the period table are organized by this
  5. 8. the lightest element on the periodic table
  6. 10. Mass average mass of all isotopes of an element
  7. 12. elements that are good conductors of heat and electricity
  8. 15. a vertical column of elements on periodic table
  9. 17. elements that do not have properties of a metal