Question

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

Answer 1

The energy required to remove an electron from singly Ionise Helium atom

E+E_{0}\cdot \frac{z^{2}}{n^{2}}=(13.6ev)\cdot 2^{2}=54.4ev

energy required to remove electron from helium atom = \frac{54.4}{2.2}=24.73ev

Total energy required = 54.4+24.7\simeq 79eV

Option 1)

20 eV

Option 2)

34 eV