Periodic Table

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Across
  1. 2. Dmitri ______ (last name) proposed the periodic table in 1869
  2. 3. It is the first element of the periodic table
  3. 6. Number of total periods
  4. 7. It is the second element of the periodic table
  5. 9. Elements are listed in the table by the structure of their
  6. 10. Each element has its own name and _____
  7. 11. The creator of the Periodic table was ______ (nationality)
Down
  1. 1. It is the same number of protons in each atom
  2. 4. The Periodic Table is a way of listing the
  3. 5. It is called "periodic" because elements are lined up in _____
  4. 8. There are 18 columns or ____