https://commons.wikimedia.org/wiki/File:Sodium_spectrum_visible.png

    Caption: The emission line spectrum of neutral sodium (Na, Z=11) (i.e., Na I).

    UNDER CONSTRUCTION

    Credit/Permission: © User:McZusatz, 2013 / CC BY-SA 1.0.
    Image link: Wikimedia Commons: File:Sodium spectrum visible.png.
    Local file: local link: line_spectrum_sodium.html.
    File: Spectra file: line_spectrum_sodium.html.