1.

Calculate the minimum potential (eV) which must be applied to a fr ee electron so that it has enough energy to excite, upon impact, the electron in a hydrogen atom from its ground state to a state of n = 5.

Answer»


SOLUTION :For hydrogen ATOM,
`DeltaE = E_(5)-E_(1)`
`=(13.6)/(5)^(2) -(-13.6)/(1)^(2)`
`=(-13.6)/25 + 13.6`
`=-0.544 + 13.6`
`=13.05` EV


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