Question

If 13.6eV energy is required to ionize the hydrogen atom, then the energy required to remove an electron from $n=2$ is:

• A. 10.2 eV
• B. 0 eV
• C. 3.4 eV
• D. 6.8 eV

Answer 1

Answer: (C)

3.4 eV

Answer 2

Energy required to remove an electron from nth orbit is ${{E}_{n}}=-\frac{13.6}{{{n}^{2}}}$ Here, $n=2$ Therefore, ${{E}_{2}}=-\frac{13.6}{{{2}^{2}}}$ $=-3.4V$