`IE_(2) > IE_(1)` for a given element - why?

Explanation

`IE_(2) gt IE_(1)` for a given element
Reason: `rarr IE_(1)` means minimum amount of energy required to remove an electron from isolated neutral gaseous atom
`rarr IE_(2)` means minimum amount of energy required to remove an electron from uni positive ion.
`rarr` In case of unipositive ion nuclear attraction increases on outer most electrons than in isolated gaseous atom. So more amount of energy needed to remove an electron from unipositive ion. Hence `IE_(2) gt IE_(1)`