Atom of Ernest Rutherford, bombarded a metal foil with alpha particles to observe how they scattered. They expected all the alpha particles to pass straight through with little deflection, because Thomson's model said that the charges in the atom are so diffuse that their electric fields could not affect the alpha particles much. However, Geiger and Marsden spotted alpha particles being deflected by angles greater than 90°, which was supposed to be impossible according to Thomson's model. To explain this, Rutherford proposed that the positive charge of the atom is concentrated in a tiny nucleus at the center of the atom.
Up An' Atom Up An' Atom Up An' Atom was the name of a B-29 Superfortress (B-29-36-MO 44-27304, Victor number 88) configured during World War II in the Silverplate project to carry an atomic bomb. Assigned to the 393d Bomb Squadron, 509th Composite Group, it was built at the Glenn L. Martin Aircraft Plant at Omaha, Nebraska, accepted by the Army Air Forces on April 3, 1945, and flown to Wendover Army Air Field, Utah, by its assigned crew B-10 (Capt. George W. Marquardt, Aircraft Commander). It departed Wendover for North Field, Tinian on June 11 and arrived on June 17. It was