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 close to

Step-by-step solution

The energy is required to remove e − from singly ionized helium atom =   54.4   e V . The energy required to remove e − from a helium atom = x  eV , given 54.4  e V = 2.2  x ⇒ x = 24.73   e V . The energy required to ionize helium atom =   79.13   e V ≈ 79   eV .