The energy required to excite an electron from n = 1 to n = 2 in hydrogen atom is
Q1. The energy required to excite an electron from n = 1 to n = 2 in hydrogen atom is
Answer: 10.2 eV
Explanation: Energy difference between n = 1 and n = 2 is calculated using ΔE = 13.6 * (1 / 1² - 1 / 2²) = 10.2 eV.