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Per Bohr's model (eqn 2.13), the energy of the electron in the n-th stationary state of the hydrogen atom is which formula? (R_H = 2.18 × 10⁻¹⁸ J)
AE_n = −R_H × n
BE_n = R_H × n
CE_n = +R_H × n²
DE_n = −R_H / n²
Answer & Solution
Correct answer: D. E_n = −R_H / n²
Per NCERT eqn 2.13, E_n = −R_H / n² with R_H = 2.18 × 10⁻¹⁸ J. Negative sign indicates a bound state lower than free.
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