1.

What is the kinetic energy ofan electron in second excited state of He^(+)? (Energy of electron in first shell of H=-13.6eV)

Answer»

`-1.51eV`
`-6.04eV`
`-13.08eV`
`-13.06eV`

Solution :K.E. of electron in SECOND EXCITED staet (n=3 shell)of `He^(+)`
`K.E.=-E_(3)=-(E_(1))/9=-(13.6xx2^(2))/9`
`=-6.04eV`


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