1.

If the ionisation energy of hydrogen atom is 13.6 eV, the energy required to excite it from ground state to the next higher state is nearly

Answer»

3.4 EV
10.2 eV
12.1 eV
1.5 eV

Solution :`E_(N)=-(13.6)/(n^(2))eV,DeltaE=E_(2)-E_(1)`
`=-13.6(1/(2^(2))-1/(1^(2)))=13.6xx3/4=10.2eV`


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