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Energy of the state S(1) in units of the...

Energy of the state `S_(1)` in units of the hydrogen atom ground state energy is

A

0.75

B

1.5

C

2.25

D

4.5

Text Solution

Verified by Experts

The correct Answer is:
C
For `S_(1)` state of `Li^(2+)`, n = 2 and Z = 3.
`therefore" "` Energy of the state `S_(1)` in the units of hydrogen atom ground state energy is :
`E=E_(H)xx(Z^(2))/(n^(2))=E_(H)xx(3^(2))/(2^(2))=9/4E_(H)=2.25xxE_(H)`
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