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  1. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › periodic-table

    Periodic Table of Elements - PubChem

    Interactive periodic table with up-to-date element property data collected from authoritative sources. Look up chemical element names, symbols, atomic masses and other properties, visualize trends, or …

  2. nih.gov
    https://pubchem.ncbi.nlm.nih.gov

    PubChem

    Search and explore chemical information in the world's largest free chemistry database. Search chemicals by name, molecular formula, structure, and other identifiers.

  3. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › element › Potassium

    Potassium | K (Element) - PubChem

    Chemical element, Potassium, information from authoritative sources. Look up properties, history, uses, and more.

  4. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › element › He

    Helium | He (Element) - PubChem

    Chemical element, Helium, information from authoritative sources. Look up properties, history, uses, and more.

  5. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › element › Hydrogen

    Hydrogen | H (Element) - PubChem

    Hydrogen was first recognized as a distinct element by Henry Cavendish in 1766. Composed of a single proton and a single electron, hydrogen is the simplest and most abundant element in the universe.

  6. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › element › Palladium

    Palladium | Pd (Element) - PubChem

    Chemical element, Palladium, information from authoritative sources. Look up properties, history, uses, and more.

  7. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › ptable › atomic-mass

    Atomic Mass | Periodic Table of Elements - PubChem

    Explore how atomic mass changes with atomic number in the periodic table of elements via interactive plots.

  8. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › periodic-table › density

    Density | Periodic Table of Elements - PubChem

    Explore how density changes with atomic number in the periodic table of elements via interactive plots.

  9. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › element › Magnesium

    Magnesium | Mg (Element) - PubChem

    Chemical element, Magnesium, information from authoritative sources. Look up properties, history, uses, and more.

  10. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › element › Lead

    Lead | Pb (Element) - PubChem

    Chemical element, Lead, information from authoritative sources. Look up properties, history, uses, and more.

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