1.

The ionisation energy of hydrogen atom (in the groundstate) is x kJ. The energy required for an electron to jump from 2^(nd) orbit to the 3^(rd)orbit will be

Answer»

x/6
5x
7.2x
5x/36

Solution :`(I.E)_H=E_oo- E_1=-E_1=x`
PUT `E_1=-K/n^2=-K/1^2=-K, THEREFORE K=x`
`DeltaE=E_3-E_2=-K/3^2 - (-K/2^2)=K5/36=5/36x`


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