Question

The ionozation energy of hydrogen atom is 13.6ev the 2 ionization energy for helium is?

Answer 1

Unknown....but greater than `13.6*eV..`

Explanation:

Ionization energy interrogates the reaction...

`underbrace(M(g) + Delta_"1" rarr M^(+)(g) + e^(-))_"first ionization"`

`underbrace(M^(+)(g) + Delta_"2" rarr M^(2+)(g) + e^(-))_"second ionization"`

A priori, we would predict that `Delta_2">>"Delta_1`...given that it should be much harder to remove an electron from a cation than from a NEUTRAL species.. But this is about all we can say. Your question does not even posit the SAME atom...and I think you should reread it.