Periodic Table

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I wish to establish some sort of system not guided by chance but by some sort of definite and exact principle. — Dmitri Mendeleev

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Introduction1

Dictionary

periodic+table : an arrangement of chemical elements based on the periodic law — Webster   See also OneLook

Encyclopedia

Periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number, electron configuration, and recurring chemical properties, whose structure shows periodic trends. Generally, within one row (period) the elements are metals to the left, and non-metals to the right, with the elements having similar chemical behaviours placed in the same column. Table rows are commonly called periods and columns are called groups. Six groups have accepted names as well as assigned numbers: for example, group 17 elements are the halogens; and group 18 are the noble gases. Also displayed are four simple rectangular areas or blocks associated with the filling of different atomic orbitals.

The organization of the periodic table can be used to derive relationships between the various element properties, but also the predicted chemical properties and behaviours of undiscovered or newly synthesized elements. Russian chemist Dmitri Mendeleev was the first to publish a recognizable periodic table in 1869, developed mainly to illustrate periodic trends of the then-known elements. He also predicted some properties of unidentified elements that were expected to fill gaps within the table. Most of his forecasts proved to be correct. Mendeleev’s idea has been slowly expanded and refined with the discovery or synthesis of further new elements and the development of new theoretical models to explain chemical behaviour. The modern periodic table now provides a useful framework for analyzing chemical reactions, and continues to be widely used in chemistry, nuclear physics and other sciences.

All the elements from atomic numbers 1 (hydrogen) through 118 (oganesson) have been either discovered or synthesized, completing the first seven rows of the periodic table. The first 98 elements exist in nature, although some are found only in trace amounts and others were synthesized in laboratories before being found in nature. Elements 99 to 118 have only been synthesized in laboratories or nuclear reactors. The synthesis of elements having higher atomic numbers is currently being pursued: these elements would begin an eighth row, and theoretical work has been done to suggest possible candidates for this extension. Numerous synthetic radionuclides of naturally occurring elements have also been produced in laboratories. — Wikipedia

Periodic Table of Elements (Encyclopædia Britannica)

Periodic Table of Elements (International Union of Pure and Applied Chemistry)
Interactive Periodic Table of Elements (Los Alamos National Laboratory)
Periodic Table (American Chemical Society)
WebElements: THE periodic table on the WWW

Search

Chemical Elements (Wolfram Alpha)

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Innovation

Science

The Quest for Superheavy Elements and the Island of Stability (Christoph E. Düllmann and Michael Block, Scientific American)

Commerce

Entrepreneurship

Periodic Table of Elements Campaigns (Kickstarter)
Periodic Table of Elements Campaigns (Indiegogo)

Product

Periodic Table of Elements Gifts (Zazzle)

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Preservation

History

Niels Bohr Archive (University of Copenhagen)
Niels Bohr Institute (University of Copenhagen)
Niels Bohr (Encyclopædia Britannica)
Neils Bohr (Wikipedia)

Brief history of the development of the periodic table (Western Oregon University)

The periodic tables we almost had (Mark Lorch, Quartz)
Alternate Periodic Table Designs (Western Oregon University)
The Internet Database of Periodic Tables

Library

Library of Congress # QD65 Chemistry Tables (UPenn Online Books)

WorldCat, Library of Congress, UPenn Online Books, Open Library

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Participation

Education

Periodic Table and the Elements (Chem4Kids)
Chemical Elements Posters (Glogpedia)

Chemistry Education Resources on the Periodic Table (American Chemical Society)

MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources

Course

General Chemistry I: Atoms, Molecules, and Bonding (MITx)

Chemistry Department Courses (MIT OpenCourseWare)
Chemistry Courses (edX)

MicroBachelors Program in University Chemistry (HarvardX)

Community

Occupation

Chemists and Materials Scientists (Occupational Outlook Handbook)

Organization

International Union of Pure and Applied Chemistry
American Chemical Society
Royal Society of Chemistry
Chemical Structure Association Trust

News

Pure and Applied Chemistry Journals (International Union of Pure and Applied Chemistry)
Journal of the American Chemical Society

Periodic Table (Nature Chemistry)
Periodic Table (Scientific American)
Periodic Table (NPR Archives)

Government

Document

USA.gov

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Expression

My Favourite Element (YouTube Channel, The Royal Institution)
Periodic Videos (YouTube Channel)

Fun

Tom Lehrer at 90: a life of scientific satire (Andrew Robinson, Nature)

Hobby

Periodic Videos (YouTube Channel)

Music

Here Come Science (They Might be Giants, YouTube Playlist)
They Might Be Giants (Official Site)
They Might Be Giants (Wikipedia)

returntotop

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Related

Here are links to pages about closely related subjects.

Knowledge Realm

Physical

“Fundamentals”
Law (Constant) Relativity
Force Gravity, Electromagnetism (Light, Color)
Matter (Microscope) Molecule, Atom (Periodic Table), Particle

“Space”
Universe (Astronomical Instrument)
Galaxy Milky Way, Andromeda
Planetary System Star, Brown Dwarf, Planet, Moon

Our Neighborhood
Solar System Sun
Terrestrial Planet Mercury, Venus, Earth (Moon), Mars
Asteroid Belt Ceres, Vesta
Jovian Planet Jupiter, Saturn, Uranus, Neptune
Trans-Neptunian Object
Kuiper Belt Pluto, Haumea, Makemake
Scattered Disc Eris, Sedna, Planet X
Oort Cloud Etc. Scholz’s Star
Small Body Comet, Centaur, Asteroid

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Notes

1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.