Q178 / 180 · COMEDK 2016 · Physics

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

  • Correct answer
    A
    stability of an atom
  • B
    electrical neutrality of an atom
  • C
    small size of the atom
  • D
    stationary orbits in an atom

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.

Hence, the correct answer is option: 'A'.

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