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COMEDK2016PhysicsAtomic Physics

The existence of excitation and ionisation energies in an atom is an evidence for

Options

  1. Astability of an atom
  2. Belectrical neutrality of an atom
  3. Csmall size of the atom
  4. Dstationary orbits in an atom

Correct answer

A. stability of an atom

Step-by-step solution

The excitation energy is the minimum energy required to excite an electron from ground state of atom to any of its excited state and ionisation energy is the amount energy needed to remove an electron from an atom. So, lesser the excitation energy and more the ionisation energy, more the stability of atom.

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