All atoms of a specific element are identical and unique.
The claim that all atoms of a specific element are identical and unique is refuted by the existence of isotopes, which are atoms of the same element with different masses and neutron counts.
The claim contradicts the fundamental chemical principle of isotopes, where atoms of the same element (defined by their number of protons) can have different numbers of neutrons and thus different masses. The retrieved papers consistently discuss isotopic analysis and variations (such as Sr, C, U, and Ga isotopes), confirming that elemental atoms are not all identical.
Rivi M, D'Eusanio V, Marchetti A, Bonfiglioli E, Tassi L. Elemental Composition and Strontium Isotopic Ratio Analysis of Industrial Hemp (<i>Cannabis sativa</i> L.) for Textile Applications.. 2025. https://doi.org/10.3390/molecules30234573
The paper demonstrates that chemical elements possess varying isotopic ratios (such as strontium 87Sr/86Sr), proving that atoms of the same element are not all identical.
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Canavan A, Dirr C, Elsner M. Intramolecularly Labeled Reference Standards of Sulfamethoxazole for Fragment-Specific Isotope Analysis by Electrospray Ionization Orbitrap Mass Spectrometry.. 2026. https://doi.org/10.1021/jasms.5c00402
This study analyzes fragment-specific carbon and nitrogen isotopes, highlighting intra-elemental isotopic variations.
Chartrand MMG, Yang L, Methven B, Mihai O, Hélie JF, Adamowicz-Walczak A, Middlestead P, Mester Z, Meija J. Characterization of trace element impurities and carbon isotope delta in HIPC-1, a high-purity graphite certified reference material.. 2026. https://doi.org/10.1007/s00216-026-06428-y
The characterization of graphite reference materials proves the existence of natural variations in carbon isotope mass fractions within a single element.
Wood AD, Dunn SA, Kaye P, Higginson M, Robb J, Harrison RW. Sample preparation for actinide isotopic analysis using FIB-SEM.. 2026. https://doi.org/10.1007/s10967-025-10667-1
The research details isotopic analysis of different uranium isotopes (234U, 235U, 236U, 238U), demonstrating that atoms of the element uranium vary in mass and composition.
Wang C, Liu H, Wu D, Zhao S, Hu G, Liu W, Luo H. Gallium Abundance and Isotope Geochemistry in Coal and Mudstone from the Huainan-Huaibei Coalfield: Implications for Geological Processes and Resource Utilization.. 2026. https://doi.org/10.1021/acsomega.5c12059
The paper measures gallium isotope variations (delta 71Ga), confirming that atoms of a single element are not completely identical.
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