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



American Chemical Society (YouTube Channel)
Periodic Table (American Chemical Society)


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


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. — 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


Chemical Elements (Wolfram Alpha)



Talks about Periodic Table (TED: Ideas Worth Spreading)
Articles about Periodic Table (Big Think)




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



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




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


DDC: 546.8 Periodic Table (Library Thing)
Subject: Periodic Table (Library Thing)

Subject: Periodic Table (Open Library)

LCC: QD 467 Periodic Table (UPenn Online Books)

LCC: QD 467 Periodic Table (Library of Congress)
Subject: Periodic Table (Library of Congress)

Subject: Periodic Table (WorldCat)




Periodic Table and the Elements (Chem4Kids)

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

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


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

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

MicroBachelors Program in University Chemistry (HarvardX)



Chemists and Materials Scientists (Occupational Outlook Handbook)


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


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

Periodic Table (JSTOR)

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



Periodic Table (



Here are links to pages about closely related subjects.

Knowledge Realm


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

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


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