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One hundred years ago the Harvard University chemist Theodore William Richards was awarded the 1914 Nobel Prize in Chemistry for his accurate determination of the atomic weights of many elements. This ...

This is how carbon looks on a revised periodic table that uses intervals for the standard atomic weights of some elements. Standard atomic weights, those numbers emblazoned under the elements on the ...

TWO changes in the table of atomic weights are recommended by the Committee on Atomic Weights of the International Union of Chemistry in its second report, which has just been published; the atomic ...

A magnificent period piece from mid-19th-century Russia has just received a bit of a renovation. Five elements at the heart of the periodic table will never look the same again, following an update to ...

Clarke, Frank Wigglesworth. 1882. "The constants of nature. Part V. A recalculation of the atomic weights." Smithsonian Miscellaneous Collections, 27, (2) v–279.

Every field of science has its favorite anniversary. For physics, it’s Newton’s Principia of 1687, the book that introduced the laws of motion and gravity. Biology celebrates Darwin’s On the Origin of ...

The film demonstrates the determination of the atomic weight of copper through experimental methods. It explains the importance of atomic weights in chemistry and illustrates the process using the law ...