Which of the following is responsible to rule out the existence of definite paths or trajectories of electrons ?
(a) Pauli's exclusion principle
(b) Heisenberg's uncertainty principle
(c) Hund's rule of maximum multiplicity
(d) Aufbau principle
Werner Heiseberg, a German physicist in 1927, stated uncertainity principle which states that it is impossible to determine simulataneously, the exact position and exact momentum of an electron.
The important implications of the Heisenberg uncertainity pricniple is that it rules out existence of definite paths or trajectories of electrons and other similar particles.