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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, …

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

    NCBI | NLM | NIH

    UN GHS classification summaryMaintenance in progress The page you are trying to reach is currently unavailable due to planned maintenance. Most services will be unavailable for 24+ …

  3. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › compound › cocain

    Cocaine | C17H21NO4 | CID 446220 - PubChem

    Cocaine is a tropane alkaloid obtained from leaves of the South American shrub Erythroxylon coca. It has a role as a local anaesthetic, a central nervous system stimulant, a sodium …

  4. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › ptable › electronegativity

    Electronegativity | Periodic Table of Elements - PubChem

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

  5. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › periodic-table › pdf › Periodic_Table_…
    [PDF]

    PERIODIC TABLE OF ELEMENTS - PubChem

    PERIODIC TABLE OF ELEMENTS

  6. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › compound › fentanyl

    Fentanyl | C22H28N2O | CID 3345 - PubChem

    Fentanyl is a monocarboxylic acid amide resulting from the formal condensation of the aryl amino group of N-phenyl-1- (2-phenylethyl)piperidin-4-amine with propanoic acid. It has a role as an …

  7. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › patent

    Apparatuses having outlet elements and methods for the …

    Feb 7, 2011 · Described herein are apparatuses and methods of creating fibers, such as microfibers and nanofibers. The methods discussed herein employ centrifugal forces to …

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

    Atomic Radius | Periodic Table of Elements - PubChem

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

  9. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › periodic-table › ionization-energy

    Ionization Energy | Periodic Table of Elements - PubChem

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

  10. nih.gov
    https://pubchem.ncbi.nlm.nih.gov › periodic-table › pdf › Periodic_Table_…
    [PDF]

    PERIODIC TABLE OF ELEMENTS - PubChem

    PERIODIC TABLE OF ELEMENTSChemical Group Block 18

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