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Energy of third orbit of Bohr's atom is...

Energy of third orbit of Bohr's atom is

A

`-13.6 eV`

B

`-3.4 eV`

C

`-1.5 eV`

D

none of these

Text Solution

Verified by Experts

The correct Answer is:
C
`E_(n)=(-13.6Z^(2))/n^(2)eV`
where Z= atomic number and n=number of orbit
For H,Z=1 and for 3rd orbit `n=3`
`:. E_(3)=-(13.6)/((3)^(2))=-(13.6)/9=-1.5eV`
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