The energy required to excite a hydrogen atom from n = 1 to n = 2 is
Q1. The energy required to excite a hydrogen atom from n = 1 to n = 2 is
Answer: 10.2 eV
Explanation: Calculate E2 = -3.4 eV and E1 = -13.6 eV, then ΔE = E2 - E1 = -3.4 - (-13.6) = 10.2 eV.