CBSE Class 9 - Discovery of Nucleus Videos

• what are alpha particle?  
• what is the meaning of equipment  
• what is meant by nucleon??
• How are scientist observe the atoms in an element?  
• What are the observation of α-particle scattering experiment?
• What are α-particles?
• Why did Rutherford select a thin sheet of gold foil for his experiment?
• Where does the most of the mass of an atom reside? Which particles contribute to most of the mass of an atom?
• One of the observations during α-particle scattering is that most of the fast moving α-particles passed straight through the gold foil non-deviated. What does this observation explain?
• During Rutherford's experiment, a very small fraction of alpha-particles were deflected by 180^o, what does this prove?

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