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.
The ATOM Project The ATOM Project The ATOM Project (est. August 2012) is an international campaign by the Nazarbayev Center of Kazakhstan. The primary goal of the campaign is to build international support for the abolishment of nuclear testing. ATOM stands for "Abolish Testing. Our Mission." The goal is to achieve in force the Comprehensive Nuclear Test Ban Treaty through online petitions and other methods. The campaign is an initiative of the Nazarbayev Center whose mission includes the "promotion of nuclear responsibility, nuclear disarmament, and nuclear nonproliferation according to the vision of President Nursultan Nazarbayev (Kazakhstan)." Kazakhstan has historically been concerned about nuclear