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| What is the Periodic Table Showing? | Periodicity |
The INTERNET Database of Periodic Tables
There are thousands of periodic tables in web space, but this is the only comprehensive database of periodic tables & periodic system formulations. If you know of an interesting periodic table that is missing, please contact the database curator: Mark R. Leach Ph.D. The database holds information on periodic tables, the discovery of the elements, the elucidation of atomic weights and the discovery of atomic structure (and much, much more).
| Year: 1913 | PT id = 13, Type = formulation element structure |
Moseley's Periodic Law and Atomic Number Z
Moseley, H. G. J. The High-Frequency Spectra of the Elements. Philosophical Magazine, 26, 1024–1034 (1913).
"Moseley's law is an empirical law concerning the characteristic X-rays emitted by atoms. The law was discovered and published by the English physicist Henry Moseley in 1913–1914. Until Moseley's work, "atomic number" was merely an element's place in the periodic table and was not known to be associated with any measurable physical quantity.
"In brief, Moseley's law states that the square root of the frequency, ν, of the emitted X-ray is (approximately) proportional to the atomic number":
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| What is the Periodic Table Showing? | Periodicity |
© Mark R. Leach Ph.D. 1999 –
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