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State PCS PYQPrelims 2024

BPSC – Combined Competitive Examination · Question 150

Who was the first to propose a model for the structure of an atom?

  1. E. Goldstein
  2. Rutherford
  3. Niels Bohr
  4. J.J. Thomson
Show answer & explanation

Answer: (D) J.J. Thomson

Explanation

Sequence of atomic models: Thomson (1904) → Rutherford (1911) → Bohr (1913).

  • (A) Incorrect

    Wrong: he discovered canal rays, not an atomic model.

  • (B) Incorrect

    Wrong: his nuclear model (1911) came after Thomson's.

  • (C) Incorrect

    Wrong: his model (1913) came later.

  • (D) Correct

    Correct: Thomson proposed the first model ('plum pudding', 1904).