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If an electron in H atom has energy o...

If an electron in H atom has energy of `-76.4` kcal `"mol"^(-1)` .The orbit in which the electron is present is

A

`1st`

B

`2nd`

C

`3rd`

D

`4th`

Text Solution

Verified by Experts

`E^(n)=(-313.6)/(n^(2))` kcal/mol`implies-78.4=(-313.6)/(n^(2)):.n=2`
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