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Energy associated with the first orbit o...

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

A

`8.72xx10^(-18)`Joules

B

`0.872xx10^(-18)`Joules

C

`-0.872xx10^(-18)`Joules

D

`-8.72xx10^(-18) `Joules

Text Solution

Verified by Experts

The correct Answer is:
D
`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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