enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Silicon - Wikipedia

    en.wikipedia.org/wiki/Silicon

    Silicon is a chemical element; it has symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. It is relatively unreactive.

  3. Discovery of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Discovery_of_chemical_elements

    Prepared and isolated from urine, it was the first element whose discovery date and discoverer are recorded. [53] Its name first appears in print in the work of Georg Kaspar Kirchmayer in 1676. Recognised as an element by Lavoisier. [1] 1 Hydrogen: 1671 R. Boyle: 1671 R. Boyle Robert Boyle produced it by reacting iron filings with dilute acid.

  4. Timeline of the discovery and classification of minerals

    en.wikipedia.org/wiki/Timeline_of_the_discovery...

    1.6.2 IMA Master List of Valid Minerals period (after 1999) ... Jöns Jacob Berzelius (20 August 1779 – 7 August 1848), discovery of silicon (1824), selenium ...

  5. Jöns Jacob Berzelius - Wikipedia

    en.wikipedia.org/wiki/Jöns_Jacob_Berzelius

    Discovery of Silicon Discovery of Thorium ... (the first being the astronomer Pehr Wilhelm Wargentin's period as secretary ... (301 items as of access date 2011 ...

  6. Timeline of scientific discoveries - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_scientific...

    1778: Antoine Lavoisier (and Joseph Priestley): discovery of oxygen leading to end of Phlogiston theory. 1781: William Herschel announces discovery of Uranus, expanding the known boundaries of the Solar System for the first time in modern history.

  7. 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 ...

  8. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  9. 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 12 November 2024. 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 ...