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Rutherford's Model of Atom Video Lecture - Class 9

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1. What is Rutherford's model of the atom?

Ans. Rutherford's model of the atom is a scientific theory proposed by Ernest Rutherford in 1911. According to this model, an atom consists of a tiny, dense, positively charged nucleus at the center, around which negatively charged electrons revolve in circular orbits.

2. How did Rutherford's model of the atom differ from the previous model proposed by Thomson?

Ans. Rutherford's model of the atom differed from Thomson's model in terms of the arrangement of subatomic particles. While Thomson's model proposed that electrons were embedded in a positively charged sphere, Rutherford's model suggested that electrons revolve around a tiny, dense nucleus with a positive charge.

3. What was the significance of Rutherford's gold foil experiment in developing his atomic model?

Ans. Rutherford's gold foil experiment played a crucial role in developing his atomic model. In this experiment, he bombarded a thin sheet of gold foil with alpha particles. He expected the alpha particles to pass through the foil with slight deflections. However, some alpha particles were deflected at large angles, while a few even bounced back. This led Rutherford to conclude that most of the atom's mass and positive charge are concentrated in a small, dense nucleus at the center.

4. How did Rutherford's model explain the stability of atoms?

Ans. Rutherford's model explained the stability of atoms by proposing that the negatively charged electrons revolve around the positively charged nucleus in fixed, circular orbits. These orbits are stable because the electrostatic attraction between the positively charged nucleus and the negatively charged electrons keeps the electrons in their orbits without collapsing into the nucleus.

5. What were the limitations of Rutherford's atomic model?

Ans. Rutherford's atomic model had a few limitations. Firstly, it could not explain why the negatively charged electrons did not lose energy and fall into the positively charged nucleus due to their continuous acceleration. Secondly, it could not explain the spectral lines observed in the emission and absorption spectra of atoms. It was later modified by Niels Bohr to overcome these limitations and incorporate the concept of quantized energy levels of electrons.

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	Nov 15, 2024 Last updated

Rutherford's Model of Atom for Class 92024 is part of Class 9 preparation. The notes and questions for Rutherford's Model of Atom have been prepared according to the Class 9 exam syllabus. Information about Rutherford's Model of Atom covers all important topics for Class 92024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Rutherford's Model of Atom.

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