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  2. History of the periodic table - Wikipedia

    en.wikipedia.org/wiki/History_of_the_periodic_table

    This is an accepted version of this page This is the latest accepted revision, reviewed on 17 November 2024. Development of the table of chemical elements The American chemist Glenn T. Seaborg —after whom the element seaborgium is named—standing in front of a periodic table, May 19, 1950 Part of a series on the Periodic table Periodic table forms 18-column 32-column Alternative and ...

  3. Extended periodic table - Wikipedia

    en.wikipedia.org/wiki/Extended_periodic_table

    This is an accepted version of this page This is the latest accepted revision, reviewed on 2 January 2025. Periodic table of the elements with eight or more periods Extended periodic table Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium ...

  4. Discovery of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Discovery_of_chemical_elements

    Demarçay found spectral lines of a new element in Lecoq's samarium, and separated this element several years later. [149] 36 Krypton: 1898 W. Ramsay and W. Travers: 1898 W. Ramsay and W. Travers: On May 30, 1898, Ramsay separated a noble gas from liquid argon by difference in boiling point. [150] 10 Neon: 1898 W. Ramsay and W. Travers 1898

  5. Gustavus Detlef Hinrichs - Wikipedia

    en.wikipedia.org/wiki/Gustavus_Detlef_Hinrichs

    Hinrichs is one of the discoverers of the periodic laws, which are the basis for the periodic table of elements. [1] Although his contribution is not generally considered as important as those of Dmitri Mendeleev or Lothar Meyer, in 1867 (two years before Mendeleev) he presented his ideas on periodicity among the chemical elements in his privately printed book Programme der Atommechanik, [8 ...

  6. Periodic table - Wikipedia

    en.wikipedia.org/wiki/Periodic_table

    Periodic table of the chemical elements showing the most or more commonly named sets of ... Sama­rium 62 Sm 150.36: ... (with a half-life of 2.01×10 19 years, ...

  7. This 12-year-old memorized the periodic table at age 2. He’s ...

    www.aol.com/12-old-memorized-periodic-table...

    The gifted tween, who memorized the periodic table at 2 years old and has taught lectures at colleges in India since he was 7, graduated on Wednesday from Malverne High School in Nassau County ...

  8. History of chemistry - Wikipedia

    en.wikipedia.org/wiki/History_of_chemistry

    The 1871 periodic table constructed by Dmitri Mendeleev. The periodic table is one of the most potent icons in science, lying at the core of chemistry and embodying the most fundamental principles of the field. The history of chemistry represents a time span from ancient history to the present. By 1000 BC, civilizations used technologies that ...

  9. Travel: Remarkable artifacts reveal Pompeii history in ... - AOL

    www.aol.com/travel-remarkable-artifacts-reveal...

    The heart of the exhibit is more than 150 priceless artifacts uncovered in Pompeii and on loan for the event. Exhibit visitors examine everyday items excavated from Pompeii.