The radius of first orbit of H-atoms is 0.529 Å. The radius of first orbit of D-atoms should be — Atomic Structure Chemistry Question

💡 Solution & Explanation

The Bohr radius is inversely proportional to the reduced mass of the system. The reduced mass of deuterium (D) is slightly greater than that of hydrogen (H). Consequently, its radius will be slightly less than 0.529 Å. Therefore, correct answer is B.