Bond dissociation on energy of Br is 200 kJ/mole. The longest wavelength of photon that can break th — Atomic Structure Chemistry Question

💡 Solution & Explanation

Energy to break one bond is $\frac{200 \text{ kJ}}{N_A} = \frac{200,000}{N_A}$ J. $E = \frac{hc}{\lambda} \implies \lambda = \frac{N_A hc}{200,000} = \frac{0.12}{200,000} = 6 \times 10^{-7}$ m. Therefore, correct answer is C.