1.

Energy associated with the first orbit of He^(+)is:

Answer»

`8.72xx10^(-18)`JOULES
`0.872xx10^(-18)`Joules
`-0.872xx10^(-18)`Joules
`-8.72xx10^(-18) `Joules

Solution :`E_(N)=-2.18xx10^(-18)((Z^(2))/(n^(2)))J `
For `He^(+),Z=2, n=1`
`:.E_(1)=-2.18xx10^(-18)xx4`
`=-8.72xx10^(-18)`


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