Question

the ionisation potential of hydrogen from ground state to the first excited state ?
answer??

Answer 1

IE of hydrogen = 13.6 ev/atom

That is

∆E = 13.6 

z

2

 (

1

n

1

2

 −

1

n

1

2

 ) ev /atom

For L

i

2+

, the value of z= 3 and 

n

1

 = 2 and

 

n

2

 = ∞

∆E = 13.6 

3

2

 (

1

2

1

2

 −

1

∞

2

 ) ev /atom

      = 30.6 ev