The Modern View of Atomic Structure

What is the charge on the particies that form the beam  

Most a particles undergo no scattering because most of the atom is empty 

A few CL particles are scattered because of repulsion by a tiny positive nucleus 

What happens to most of the a particles that strike the gold foil in Rutherford s experiment Why do they behave that way  

Since Rutherford s time, as physicists have learned more and more about atomic nuclei, the hst of particles that make up nuclei has grown and continues to increase. As chemists, however, we can take a simple view of the atom because only three subatomic particles—the proton, neutron, and electron—have a bearing on chemical behavior. 

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The Rutherford Experiment movie (eChapter 2.4) shows alpha particles impinging on a thin gold foil. Describe what happens to the alpha particles and discuss how the results of this experiment shaped the modern view of atomic structure. 

The Modern View of Atomic Structure Atomic Weights (Sections 2.3 and 2.4)... 

Prior to Rutherford s gold-foil experiment, the mass and positively charged particles of an atom were thought to be evenly distributed throughout the volume of the atom, (a) Watch the movie of the Rutherford Experiment (eChapter 2.2), and describe how the experimental results would have been different if the earlier model had been correct, (b) What specific feature of the modern view of atomic structure was illuminated by Rutherford s experiment ... 

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