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The difference between fermions and bosons is that bosons do not obey :

  • A.Aufbau principle
  • B.Pauli exclusion principle
  • C.Hund's rule of maximum multiplicity
  • D.Heisenberg's uncertainty principle

Answer: B

Bosons do not obey the Pauli exclusion principle.

Fermions (half-integer spin) have antisymmetric wave functions, so no two can occupy the same quantum state. Bosons (integer spin) have symmetric wave functions and any number can share a state, which leads to Bose-Einstein condensation and laser action.

The Aufbau principle and Hund's rule are rules for filling atomic orbitals with electrons, not a fermion-boson distinction. The uncertainty principle applies to all particles.

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