The INTERNET Database of Periodic Tables
|2019 has been designated the International Year of the Periodic Table as it is the 150th Anniversary of the formulation of Mendeleev's Tabelle I|
van den Broek Periodic Table 2
From Wikipedia: Antonius Johannes van den Broek (1870-1926) was a Dutch amateur physicist notable for being the first who realized that the number of an element in the periodic table (now called atomic number) corresponds to the charge of its atomic nucleus. The 1911 inspired the experimental work of Henry Moseley, who found good experimental evidence for it by 1913. van den Broek envisaged the basic building block to be the 'alphon', which weighed twice as much as a hydrogen atom.
Read more in Chapter 4, Antonius Van Den Broek, Moseley and the Concept of Atomic Number by Eric Scerri. This chapter can be found in the book: For Science, King & Country: The Life and Legacy of Henry Moseley (Edited by Roy MacLeod, Russell G Egdell and Elizabeth Bruton).
van den Broek's periodic table of 1907: Annalen der Physik, 4 (23), (1907), 199-203
van den Broek's periodic table of 1911: Physikalische Zeitschrift, 12 (1911), 490-497); and also a paper in Nature the same year entitled: The Number of Possible Elements and Mendeléff's "Cubic" Periodic System, Nature volume 87, page 78 (20 July 1911)
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