Define ionization energy.
How would the ionization energy change, when an electron in hydrogen atom is replaced by a particle of mass 200 times that of the electron but having the same charge ?
Ionization energy is defined as the amount of energy needed to remove the valence electron of an isolated gaseous atom.
The ionization energy of hydrogen atom is
When mass of electron is replaced by a particle having mass =200 me,then
E′H∝200 me ...(ii)
From (i) and (ii), we have
E′H=200 EH=200×(−13.6)=−2720 eV