1 янв 1856 г. - John Newlands

Описание:

Just four years before Mendeleev announced his periodic table, Newlands noticed that there were similarities between elements with atomic weights that differed by seven. He called this The Law of Octaves, drawing a comparison with the octaves of music. The noble gases (Helium, Neon, Argon etc.) were not discovered until much later, which explains why there was a periodicity of 7 and not 8 in Newlands table. Newlands did not leave any gaps for undiscovered elements in his table, and sometimes had to cram two elements into one box in order to keep the pattern. Because of this, the Chemical Society refused to publish his paper, with one Professor Foster saying he might have equally well listed the elements alphabetically.


Even when Mendeleev had published his table, and Newlands claimed to have discovered it first, the Chemical Society would not back him up. In 1884 he was asked to give a lecture of the Periodic Law by the Society, which went some way towards making amends. Finally, in 1998 the Royal Society of Chemistry oversaw the placing a bl

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