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The energy of an atom or ion in the firs...

The energy of an atom or ion in the first excited state is -13.6 eV. It may be

A

`He^+`

B

`Li^(++)`

C

Hydrogen

D

Deuterium

Text Solution

Verified by Experts

The correct Answer is:
A
`E prop (Z^2)/(n^2`
`:. ((-13/2)xx(Z))^2/((2))^2 =- 13.6`
`:. Z =2 `
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