Question

What is the energy in eV required to excite the electron from n=2 t n=3 state in hydrogen atom? (n = principal quantum number)

• A. 1, 89
• B. 3,4
• C. 10,2
• D. 1, 51

Answer 1

Answer: (A)

1, 89

$E=13.6[1/n_1^2-1/n_2^2]eV$

$=13.6[1/2^2-1/3^2]eV$

$=13.6\left(5/36\right)eV$

$=1.89eV$