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Question: Answered & Verified by Expert
If $13.6 \mathrm{eV}$ energy is required to ionize the hydrogen atom, then the energy required to remove an electron from $n=2$ is
PhysicsAtomic PhysicsJEE MainJEE Main 2002
Options:
  • A
    $10.2 \mathrm{eV}$
  • B
    $0 \mathrm{eV}$
  • C
    $3.4 \mathrm{eV}$
  • D
    $6.8 \mathrm{eV}$
Solution:
2768 Upvotes Verified Answer
The correct answer is:
$3.4 \mathrm{eV}$
$E_n=-\frac{13.6}{n^2} \Rightarrow E_2=-\frac{13.6}{2^2}=3.4 \mathrm{eV}$

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