DEFINITION VALID FOR SINGLE ELECTRON SYSTEM :
Ground state:
Lowest energy state of any atom or ion is called ground state of the atom.It is n=1.
Excited State :
States of atom other than the ground state are called excited states.
Ionisation energy (IE):
Minimum energy required to move an electron from ground state to `n=oo` is called ionisation energy of the atom or ion.
Ionisation Potential (I.P) :
Potential difference through which a free electron must be accelerated from rest, such that its kinetic energy becomes equal to ionisation energy of the atom is called ionisation potential of the atom.
Excitation Energy :
Energy required to move an electron from ground state of the atom to the atom is called excitation energy of that state.
Excitation Potential :
Potentail difference through which an electron must be accelerated from rest to so that its kinetic energy becomes equal to excitation energy of any state is called excitation potentail of that state.
Binding Energy 'or' Seperation Energy :
Energy required to move an electron from any state to `n=oo` is called binding energy of that state.
If the I excitation potential of a hypothetical H-like is 62 V, then the value of II excitation energy is about :

Options

A. 192 eV
B. 30 eV
C. 216 eV
D. 40.5 eV

Answer

A

Explanation

I excitation potential `=10.2 Z^2=162 V`
`:.` II excitation energy `=12.09 Z^2=12.09xx162/10.2=192 eV`