{"content":{"sharePage":{"page":0,"digests":[{"id":"6449427","dateCreated":"1225071939","smartDate":"Oct 26, 2008","userCreated":{"username":"mollyyymillerrr","url":"https:\/\/www.wikispaces.com\/user\/view\/mollyyymillerrr","imageUrl":"https:\/\/www.wikispaces.com\/i\/user_none_lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/pscpperiod4mm.wikispaces.com\/share\/view\/6449427"},"dateDigested":1532768698,"startDate":null,"sharedType":"discussion","title":"H.G.J basic","description":"Henry Gwyn Jeffreys Moseley (November 23, 1887 \u2013 August 10, 1915) was an English physicist. His main contributions to science were the quantitative justification of the previously empirical concept of atomic number, and Moseley's law. This law advanced chemistry by immediately sorting the elements of the periodic table in a more logical order. It also advanced basic physics by providing independent support for the Bohr model of the Rutherford\/Antonius Van den Broek nuclear atom containing positive nuclear charge equal to atomic number.<br \/>\n<br \/>\nfrom: <!-- ws:start:WikiTextUrlRule:2:http:\/\/en.wikipedia.org\/wiki\/Henry_Moseley --><a class=\"wiki_link_ext\" href=\"http:\/\/en.wikipedia.org\/wiki\/Henry_Moseley\" rel=\"nofollow\">http:\/\/en.wikipedia.org\/wiki\/Henry_Moseley<\/a><!-- ws:end:WikiTextUrlRule:2 -->","replyPages":[{"page":0,"digests":[{"id":"6449611","body":"Previous to Moseley and his law, atomic numbers had been thought of as a semi-arbitrary ordering number, vaguely increasing with atomic weight but not strictly defined by it. Moseley's discovery showed that atomic numbers were not arbitrary but have a physical basis. He redefined the idea of atomic numbers from its previous status as an around-about approximate numerical tag to help sorting, i.e. in the periodic table, into a real and objective whole-number quantity which was experimentally directly measurable. Furthermore, as noted by Bohr, Moseley's law provided a reasonably complete experimental set of data supporting the (at that time new from 1911) Ernest Rutherford\/Antonius Van den Broek concept of the atom, in which atomic number is understood as representing physically exactly the number of positive charges (protons) in a central atomic nucleus (Moseley mentions these two scientists in his paper, but does not actually mention Bohr). A simple modification of Rydberg and Bohr's formula was found to give Moseley's empirically-derived law for measurement of atomic number.<br \/>\n<br \/>\nalso from: <!-- ws:start:WikiTextUrlRule:2:http:\/\/en.wikipedia.org\/wiki\/Henry_Moseley --><a class=\"wiki_link_ext\" href=\"http:\/\/en.wikipedia.org\/wiki\/Henry_Moseley\" rel=\"nofollow\">http:\/\/en.wikipedia.org\/wiki\/Henry_Moseley<\/a><!-- ws:end:WikiTextUrlRule:2 -->","dateCreated":"1225072313","smartDate":"Oct 26, 2008","userCreated":{"username":"mollyyymillerrr","url":"https:\/\/www.wikispaces.com\/user\/view\/mollyyymillerrr","imageUrl":"https:\/\/www.wikispaces.com\/i\/user_none_lg.jpg"}},{"id":"6449741","body":"<!-- ws:start:WikiTextUrlRule:0:http:\/\/content.answers.com\/main\/content\/wp\/en\/thumb\/1\/1e\/300px-Henry_Moseley.jpg --><a class=\"wiki_link_ext\" href=\"http:\/\/content.answers.com\/main\/content\/wp\/en\/thumb\/1\/1e\/300px-Henry_Moseley.jpg\" rel=\"nofollow\">http:\/\/content.answers.com\/main\/content\/wp\/en\/thumb\/1\/1e\/300px-Henry_Moseley.jpg<\/a><!-- ws:end:WikiTextUrlRule:0 -->","dateCreated":"1225072624","smartDate":"Oct 26, 2008","userCreated":{"username":"mollyyymillerrr","url":"https:\/\/www.wikispaces.com\/user\/view\/mollyyymillerrr","imageUrl":"https:\/\/www.wikispaces.com\/i\/user_none_lg.jpg"}}],"more":0}]},{"id":"6376527","dateCreated":"1224781506","smartDate":"Oct 23, 2008","userCreated":{"username":"shanderson12","url":"https:\/\/www.wikispaces.com\/user\/view\/shanderson12","imageUrl":"https:\/\/www.wikispaces.com\/i\/user_none_lg.jpg"},"monitored":false,"locked":false,"links":{"self":"https:\/\/pscpperiod4mm.wikispaces.com\/share\/view\/6376527"},"dateDigested":1532768700,"startDate":null,"sharedType":"discussion","title":"info ","description":"The work of H. G. J. Mosley brought the elements in to a new arrangement (although minimal). He selected to arrange the elements by their atomic number (number of protons) rather than their weight. His work in 1914 led to what we call the Law of Chemical Periodicity.","replyPages":[{"page":0,"digests":[{"id":"6424693","body":"Proof: <br \/>\n          Moseley took measurements of the wavelengths of the X-ray spectral lines of a number of elements which showed that the ordering of the wavelengths of the X-ray emissions of the elements coincided with the ordering of the elements by atomic number. With the discovery of isotopes of the elements, it became apparent that atomic weight was not the significant player in the periodic law as Mendeleev, Meyers and others had proposed, but rather, the properties of the elements varied periodically with atomic number.","dateCreated":"1224943329","smartDate":"Oct 25, 2008","userCreated":{"username":"shanderson12","url":"https:\/\/www.wikispaces.com\/user\/view\/shanderson12","imageUrl":"https:\/\/www.wikispaces.com\/i\/user_none_lg.jpg"}}],"more":0}]}],"more":false},"comments":[]},"http":{"code":200,"status":"OK"},"redirectUrl":null,"javascript":null,"notices":{"warning":[],"error":[],"info":[],"success":[]}}