Minimum energy required to take out the only one electron from ground

1.	Minimum energy required to take out the only one electron from ground state of He^(+) is
Answer» `13.6` EV `54.4` eV `27.2` eV `6.8` eV Solution :IONISATION energy, E= `13.6 Z^(2) eV` Fe `he^(+), Z = 2` `therefore E = 13.6 XX (2)^(2) = 13.6 xx 4 = 54.4 eV`

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Minimum energy required to take out the only one electron from ground state of He^(+) is

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