Periodic Table

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12345678910111213
Across
  1. 2. Creator of the first periodic table
  2. 5. elements that do not have metal properties
  3. 9. the total number of protons and neutrons within an element
  4. 10. Elements of group 1 that are very reactive in water
  5. 11. horizontal rows of the periodic table
  6. 12. The non-metallic elements of group 17
  7. 13. the number of protons and neutrons in an element
Down
  1. 1. metallic elements within groups 3 and 12
  2. 3. matter made up of a single type of atom
  3. 4. elements that are good conductors of heat and electricity
  4. 5. the non-reactive elements of group 18
  5. 6. the somewhat soft and reactive elements of group 2
  6. 7. elements that are neither metal nor nonmetal
  7. 8. vertical columns of the periodic table