Find the ionisation energy of a doubly lonized lithium atom.

This is a doubly ionized Helium atom.

The ionisation energy of hydrogen atom is 13.6 eV , the ionisation energy of a singly ionsed helium atom would be

For a doubly ionised Li-atom

For a doubly ionised Li-atom

For a doubly ionised Li-atom

For a doubly ionised Li-atom