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  1. Periodic Table - Ptable

  2. Free Printable Periodic Tables (PDF and PNG)

  3. Periodic Table of Elements - PubChem

  4. Periodic TableRoyal Society of Chemistry

  5. Interactive Periodic Table of Elements | Fisher Scientific

  6. Periodic Table With Everything - Science Notes and Projects

  7. Interactive Periodic Table of the Elements

  8. Free Printable Periodic Tables (PDF) - ThoughtCo