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    Periodic Table Resources
    K-12 Level

    Periodic Table Milestones
    1789: Antoine Lavoisier (French) published a list of 33 chemical elements grouped into gases, metals, nonmetals, and earths.

    1829: Johann Wolfgang Dobereiner (German) observed that many of the elements when grouped into groups of three (triads) based on their chemical properties and arranged by atomic weight, the second member of each triad was roughly the average of the first and the third (Law of Triads).

    1843: Leopold Gmelin (German) identified ten triads, three groups of four, and one group of five elements.

    1857: Jean Baptiste Dumas (French) described relationships between various groups of metals.

    1858: August Kekule (German) observed that carbon has a tendency to bond with other elements in a ratio of one to four. This concept eventually became known as valency.

    1864: Julius Lothar Meyer (German) published a table of the 49 known elements of his time arranged by valency. The table revealed that elements with similar properties often shared the same valency.

    1864: John Newlands (English) described his own classification of the elements and noted that when listed in order of increasing atomic weight, similar physical and chemical properties recurred at intervals of eight. Based on this, Newlands was able to draft an atomic table and use it to predict the existence of missing elements, such as germanium.

    1869: Dmitri Mendeleev (Russian) developed the modern periodic table as it is known today.

    1898: William Ramsay (Scottish) discoverd the noble gases - a new group in the periodic table.

    1939: Marguerite Perey (French) discovered francium (maybe the last naturally occurring element) based on filling gapes in Mendeleev's periodic table.

    1940: Glenn Seaborg (American) discovered plutonium and orher transuranium elements (with Edwin McMillan).

    2000: Russian Scientists at Dubna detected a single decay from an atom of ununhexium.

    Periodic Table for Kids
    Periodic Table and the Elements
    Periodic Table of Elements for Kids
    Periodic Table of Elements
    Periodic Table Science Videos, Games and Lessons
    Periodic Table of the Elements in Pictures
    The Periodic Table: Metals, Nonmetals, and Metalloids - For Dummies

    Periodic Table Games and Quizzes
    Math and Periodic Table Game
    Chemical element games
    Can you name the Elements of the Periodic Table?
    Periodic Table Quiz
    Periodic Table of Elements Quiz

    Periodic Table for Teachers
    Printable Periodic Tables - Science Teacher Resources
    Teachers' Domain: Periodic Table of the Elements
    The Photographic Periodic Table of the Elements
    Teacher's Guide to Chemistry's Periodic Table (Video)
    Periodic Table of the Elements - National Research Council Canada

    The periodic table Frequently asked questions
    Periodic Table FAQ

    Glossaries and Dictionaries
    Chemistry and Environmental Dictionary
    The periodic table glossary

    Periodic Table Timeline
    History of the Periodic Table
    Periodic table history

    The Wooden Periodic Table Table
    The Most Beautiful Periodic Table Displays in the World
    Museum of the Periodic Table

    Trivia and Humor
    Chemistry Jokes and the Periodic Table - Jokes and Science
    Chemistry Trivia Quiz - General Chemistry Online
    The Periodic Table Quiz - Jokes and Science
    Molecules with Silly or Unusual Names - Paul May
    The Comic Book Periodic Table of the Elements - James F. Holler and John P. Selegue
    Balloon Molecules - balloonmolecules.com

    General Periodic Table Resources
    Quick Chemistry Facts - patent-invent.com
    Interactive Periodic Table - learner.org
    Atomic Structure and the Periodic Table - Stephen Lower, Simon Fraser University
    Periodic Table and More - chemicool.com
    The Wooden Periodic Table Table - Theodore W. Gray
    Periodic Table - chem4kids.com
    The Visual Elements Periodic Table - chemsoc.org
    WebElements Periodic Table
    Periodic Table of Elements - EnvironmentalChemistry.com
    The Path to the Periodic Table
    History of the Periodic Table
    Periodic Table - Wikipedia
    The Comic Book Periodic Table of the Elements - James F. Holler and John P. Selegue
    American Elements
    Julius Lothar Meyer and Dmitri Ivanovich Mendeleev
    The Path to the Periodic Table

    Science Fair Projects and Experiments
    Chemistry Projects

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    Last updated: June 2013
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