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#Mon Aug 09 12:01:57 CEST 2010
Text__HnaBQKOdEd-WfYQ0GneCwQ_title=Thomson's Atomic Model
Text__HnaBQKOdEd-WfYQ0GneCwQ_text=<p>Around the turn of the 19th/20th century it is recognized that there must be positive and negative charges in the atom. Thereupon, in 1903/04, Joseph John Thomson, the discoverer of the electron, develops one of the first modern atomic models\: negatively charged electrons are distributed in a diffuse sphere with a positive charge\: this is the so-called <q>plum cake</q> model.</p>