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  1. Periodic Table of Elements - PubChem

  2. List of chemical elements - Wikipedia

  3. Special Symbols - The Physics Hypertextbook

  4. Periodic Table - Ptable

  5. Element List – Element Names, Symbols, and Atomic Numbers

  6. Science Symbols and Meanings - EdrawMax Online

  7. The chemical elements of the periodic table sorted by symbol - Lenntech

  8. Interactive Periodic Table of Elements | Fisher Scientific

  9. Science Symbols | Definition, Uses & Examples | Study.com

  10. Periodic Table of Elements - IUPAC | International Union of Pure …