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Structure of Atom
| 1s orbital | 2s orbital |
| 1. It is smaller in size than 2s orbital. | 1. It is larger in size than 1s orbital. |
| 2. It consists of a single sphere having no local plane. | 2. It consists of two spheres having one nodal plane. |
| 3. An electron in it has lesser energy. | 3. An electron in it has greater energy. |
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What is the name of the remaining part of atom except outer orbit?
Name the particles which determine the mass of an element.
What are α-particles?
What are the fundamental particles present in a neutral atom having atomic number greater than 1?
Do protons and neutrons have identical mass?
When α-particles are sent through a thin metal foil, most of them go straight through the foil. What inference do you draw from it?
What did Rutherford's experiment on scattering of particles show for the first time?
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