1. Tardigrade
  2. Question
  3. Physics
  4. The ionisation energy of an electron in the ground state of helium atom is 24.6 eV. The energy required to remove both the electron is

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The ionisation energy of an electron in the ground state of helium atom is $24.6\, eV$. The energy required to remove both the electron is

KCETKCET 2013Atoms

Solution:

lonisation energy in ground state $=24.6 \,eV$
Energy required to remove $2^{n}$ electron from $He ^{2+}$
$=Z^{2}(13.6)\, eV =(2)^{2}(13.6)=54.4\, eV$
So, total energy required $=24.6+54.4=79\, eV$