The energy required to dislodge electron from excited isolated hydrogen atom(IE1=13.6eV).
A)=13.6ev B)>13.6 C) <13.6 and >3.4 D)less than or equal to 3.4eV
The answer is D but how if i assume that the electron is at the second energy state(n=2) its energy would be -3.4eV so we should give either 3.4ev or more than that

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Solution

For second excited state, 3.4eV would do.

For third or other exited states, Energy required would be less than 3.4eV.

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For second excited state, 3.4eV would do. For third or other exited states, Energy required would be less than 3.4eV.

For second excited state, 3.4eV would do.

For third or other exited states, Energy required would be less than 3.4eV.