Mendeleev

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Across
  1. 3. He became a _____ of chemistry.
  2. 4. During his writing what did he discover
  3. 5. He created them and listed them by what?
Down
  1. 1. 1868 principle of _____ published
  2. 2. created the periodic table
  3. 6. In 1847 his mom opened a _____ factory?