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  1. Atomic Spectra - HyperPhysics

  2. He - Interactive Atomic Spectra

  3. Visualizing Atomic Structure: Bohr Rutherford Diagrams for Every …

  4. Videos of Helium - The Royal Society of Chemistry

  5. Atomic Spectra - HyperPhysics

  6. Pictures of Helium, its minerals and applications. - Periodic Table

  7. Visual Representation of Helium’s Electron Dot Structure

  8. Helium’s Lewis Dot Diagram

  9. Visual Representation of Helium’s Electron Configuration

  10. Visual Elements Periodic Table - AAPT

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