The energy required to excite an electron from the ground state of hydrogen atom to the first excited state, is
Answer & explanation
Correct answer: option 3
Energy to excite the e- from n = 1 to n = 2
$E=-3.4-(-13.6)=10.2 ~eV=10.2 \times 1.6 × 10^{-19}$
$1.632 × 10^{-18}$ J