BPSC – Combined Competitive Examination · প্রশ্ন 150
Who was the first to propose a model for the structure of an atom?
উত্তর দেখান ও ব্যাখ্যা
উত্তর: (D) J.J. Thomson
ব্যাখ্যা
Sequence of atomic models: Thomson (1904) → Rutherford (1911) → Bohr (1913).
- (A) ভুল
Wrong: he discovered canal rays, not an atomic model.
- (B) ভুল
Wrong: his nuclear model (1911) came after Thomson's.
- (C) ভুল
Wrong: his model (1913) came later.
- (D) সঠিক
Correct: Thomson proposed the first model ('plum pudding', 1904).