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Element Lookup

Periodic table API: complete data for any of the 118 chemical elements — look up by symbol (Fe), name (iron), or atomic number (26). Returns atomic mass, category, phase at STP, period/group, electron configuration, electronegativity, melting and boiling points, density, electron shells, and a summary. For chemistry, materials, education, and science agents. Attributed dataset.

POST https://x402.forgemesh.io/element-lookup

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