Question

# If $$13.6\space eV$$ 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

Solution

## The correct option is C $$3.4\space eV$$Energy of hydrogen $$E_n=\dfrac{-13.6\times Z^2}{n^2}$$So for $$n= 2$$, $$E=-3.4\ eV$$So, energy required is $$3.4\ eV$$.Physics

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