Periodic Table Crossword

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Across
  1. 5. He arranged the elements in the periodic table
  2. 6. Elements in a ____________, or family, of the periodic table have similar characteristics.
  3. 7. in stars more massive than the sun, fusion continues until the core is almost all _________
  4. 9. elements in the same column in the periodic table have similar ___________
  5. 11. the periodic table is organized by ___________ _____________
  6. 12. An element's ______________is its row in the periodic table
Down
  1. 1. the average mass of all the isotopes of that element
  2. 2. a state of matter that consists of a gas like mixture of free electrons
  3. 3. You can use an element's position in the periodic table to predict its _______________
  4. 4. A one or two letter representation of an element is called a
  5. 8. the process in which two atomic nuclei combine to form a larger nucleus, releasing huge amount of energy
  6. 10. a regular repeated pattern