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Question: Answered & Verified by Expert
A He+ ion is in its first excited state. Its ionization energy is:
PhysicsAtomic PhysicsJEE MainJEE Main 2019 (09 Apr Shift 2)
Options:
  • A 13.60 eV
  • B 48.36 eV
  • C 54.40 eV
  • D 6.04 eV
Solution:
1230 Upvotes Verified Answer
The correct answer is: 13.60 eV
E=-13.6z2n2
=-13.62222=-13.60 eV
Total energy of He+ ion is in its first excited state is -13.60 eV . Hence, its ionization energy will be 13.60 eV 

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