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1. iupac.qmul.ac.uk › AtWtATOMIC WEIGHTS OF THE ELEMENTS 2021 - Queen Mary University of...

   iupac.qmul.ac.uk › AtWt

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   Find the standard atomic weights of the elements based on the 2021 table with changes from the 2019 table for some elements. See also the range of atomic weights for elements with multiple isotopes and the periodic table with atomic weights to five significant figures.

   • 2019 Atomic Weights

     ATOMIC WEIGHTS OF THE ELEMENTS 2019. These tables are based...

2. periodictableguide.com › atomic-mass-of-all-elementsAtomic Mass of all Elements (Chart + Rounded values) - Periodic...

   periodictableguide.com › atomic-mass-of-all-elements

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   1 wrz 2024 · Access detailed info on all elements: atomic mass, electron configurations, charges, and more. View rotating Bohr models for all 118 elements. Get a free HD image of the Periodic Table.

3. www.britannica.com › science › atomic-weightAtomic weight | Definition, Units, & Table | Britannica

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   26 wrz 2024 · Atomic weight, ratio of the average mass of a chemical element’s atoms to some standard. Since 1961 the standard unit of atomic mass has been one-twelfth the mass of an atom of the isotope carbon-12. Atomic weight is measured in atomic mass units (amu), also called daltons.

4. iupac.org › what-we-do › periodic-table-of-Periodic Table of Elements - IUPAC | International Union of Pure...

   iupac.org › what-we-do › periodic-table-of-

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   Find the latest standard atomic weight values, isotopic abundances, and element names for each element in the periodic table. Learn about the criteria, rules, and history of new element discoveries and naming.

5. ptable.comPeriodic Table - Ptable

   ptable.com

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   Interactive periodic table showing names, electrons, and oxidation states. Visualize trends, 3D orbitals, isotopes, and mix compounds. Fully descriptive writeups.

6. physics.nist.gov › cgi-bin › CompositionsAtomic Weights and Isotopic Compositions for All Elements - NIST

   physics.nist.gov › cgi-bin › Compositions

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   Atomic Weights and Isotopic Compositions for All Elements. Isotope. Relative Atomic Mass. Isotopic Composition. Standard Atomic Weight. Notes.

7. www.nist.gov › pml › periodic-table-elementsPeriodic Table of the Elements | NIST

   www.nist.gov › pml › periodic-table-elements

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   30 lip 2009 · The periodic table contains NIST’s latest critically evaluated data for atomic properties of the elements. The PDF is suitable for high-resolution color printing for desk or wall-chart display. Access the Table: PDF without crop marks | PDF with crop marks.