NIST Atomic Weights and Isotopic Compositions with Relative Atomic Masses
收藏NIST Chemistry WebBook2025-01-29 更新2026-03-14 收录
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https://www.nist.gov/pml/atomic-weights-and-isotopic-compositions-relative-atomic-masses
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资源简介：
The atomic weights are available for elements 1 through 118 and isotopic compositions or abundances are given when appropriate. Version 3.0.
