Question

The I.E. of hydrogen atom is $13.6$ eV. The energy required to remove an electron from $n=2$ state of the hydrogen atom is:

• A. 11.2 eV
• B. 3.4 eV
• C. 10.2 eV
• D. 13.6 eV

Answer 1

Answer: (B)

3.4 eV

Given IE $=13.6ev$

$I.E=13.6\frac{z^2}{n^2}=13.6\times \frac{1}{4}=3.4ev.$

Hence, the correct option is $\text{B}$