The energy required to remove the electron from a singly ionized Helium atom is 2.2 times the energy required to remove an electron from Helium atom. The total energy required to ionize the Helium atom completely is:

Step-by-step solution

Energy required to remove e ⁻ from singly ionized helium atom = (13.6) Z^2 1^2 =54.4 eV ( Z =2) Energy required to remove e ⁻ from helium atom =x eV According to question, 54.4 eV =2.2 x x =24.73 eV Therefore, energy required to ionize helium atom =(54.4+24.73) eV =79.12 eV