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Spectral lines of the chemical elements; Z Element Symbol Spectral lines (file) 1 hydrogen H: File:Hydrogen spectrum visible.png: 2 helium He: File:Helium spectrum visible.png
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Simulated emission spectrum of neutral Erbium (Er I) based on data from the National Institute of Standards and Technology Atomic Spectra Database (NIST ASD). Date: 20 January 2025: Source: Image generated through the NIST ASD website: Author: Kramida, A., Ralchenko, Yu., Reader, J., and NIST ASD Team (2024).
The table is color-coded to show the chemical groupings. Small symbols pack in additional information: solid/liquid/gas, the color of an element, common in the human body, common in the earth's crust, magnetic metals, noble metals, radioactive, and rare or never found in nature.