Determine the ionisation potential of a hydrogen atom, Chemistry

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The ionisation potential of a hydrogen atom is -13.6 eV. What will be the energy of the atom corresponding to n= 2.

(1) -3.4 eV

(2)-6.8 eV

(3) -1.7 eV

(4)- 2.7 eV

Ans: (a)-3.4 eV

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