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The ionisation potential of hydrogen atom is 13.6 volt. The energy required to remove an electron from the second orbit of hydrogen is :
  • a)
     3.4 eV
  • b)
    6.8 eV
  • c)
    13.6 eV
  • d)
    27.2 eV
Correct answer is option 'A'. Can you explain this answer?
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The ionisation potential of hydrogen atom is 13.6 volt. The energy req...
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The ionisation potential of hydrogen atom is 13.6 volt. The energy req...
Ionization energy-
Eion=E-En
=13.6 (Z2/n2)
- wherein
Energy required to move an electron from ground state to 
n=∞
Energy required to remove electron from 2nd bohr orbit is 
△E=E0 . [1/{22-(1/∞)}]=E0/4=(13.6/4) eV
△E=3.4eV
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