1.

If first orbit energy of He^(+) is -54.4 eV, then the second orbit energy will be

Answer»

`-54.4 eV`
`-13.6 eV`
`-27.2 eV`
`+27.2 eV`

SOLUTION :`E=(E_(0))/(n^(2))=(-54.4)/(4)=-13.6eV`


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