Sources & licensing. Element names, symbols, atomic numbers, and atomic masses are from the open-source periodictable library (public domain). Natural-abundance isotope data are from the NUBASE2020 evaluation — F.G. Kondev et al., Chinese Physics C 45, 030001 (2021), open access under CC BY 3.0, which permits reproduction and commercial use with attribution. States of matter at standard conditions are common scientific knowledge. Layout follows the standard 18-column periodic table convention; all rendering is original to this site.
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