Question

In a sample of hydrogen like species ions are in excited state if electrons

Answer 1

Explanation:

Here is the answer to your question:

E=-13.6Z^2/n^2.

For n=5(4th excited state) Z=5. For Z=5 E and n =3(2nd excited state) E is 13.6*25/9=37.77

Sinece 37.7>25 therefore the electron cant be set free

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