The wavelength of first line of Lyman series of H-atom is 1216 Å. What will be the wavelength of fir — Atomic Structure Chemistry Question

💡 Solution & Explanation

Wavelength $\lambda \propto \frac{1}{Z^2}$ for the same transition in hydrogen-like species. For sodium ($Z=11$), $\lambda_{Na} = \frac{\lambda_H}{11^2} = \frac{1216}{121} \approx 10$ Å. Therefore, correct answer is C.