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Q74 (NDA-I/2025) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Atomic and nuclear physics Answer Verified

Which one of the following findings is NOT observed in Rutherford's Nuclear Model of Atom ?

Result
Your answer: —  Â·  Correct: A
Explanation

Rutherford's Nuclear Model of the Atom, proposed in 1911, describes the atom as having a small, dense, and positively charged center called the nucleus [1]. Option 1 is incorrect because Rutherford identified the nucleus as positively charged, not neutral, based on the repulsion of alpha particles. His model established that nearly all the mass of an atom is concentrated in this central nucleus. He also proposed that electrons revolve around the nucleus in circular paths, similar to planets orbiting the sun [2]. Furthermore, his experiments demonstrated that the nucleus is extremely small, occupying a volume roughly 10,000 to 100,000 times smaller than the total size of the atom, leaving most of the atom as empty space [1].

Sources

  1. [1] https://www2.lbl.gov/abc/wallchart/teachersguide/pdf/Chap02.pdf
  2. [2] https://www.sciencedirect.com/topics/chemistry/nuclear-model
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