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Energy of ground state of hydrogen atom ...

Energy of ground state of hydrogen atom is `-13.6eV`.What is its ionisation potential?

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Ioniasation energyU=13.6ev=`13.6xx1.6xx10^(-19)j`
ionisation potential= U/e=`(13.6xx1.6xx10^(-19)) /(1.6xx10^(-19)`=13.6ev
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