1.

The total energy of H_(2) atom, when the electron is in the second quantum state is E_(2). The total energy of He^(+) ion in the third quantum state is :

Answer»

`(3)/(2)E_(2)`
`(2)/(3)E_(2)`
`(4)/(9)E_(2)`
`(16)/(9)E_(2)`.

Solution :`E_(2)(H)=(E_(1)(H))/(2^(2)) :. E_(1)(H)=4E_(2)(H)`
`E_(3)(He^(+))=(Z^(2)E_(1)(H))/(2^(2))`


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