Question

Which of the following is responsible to rule out the existence of definite paths or trajectories of electrons?
(i) Pauli’s exclusion principle.
(ii) Heisenberg’s uncertainty principle.
(iii) Hund’s rule of maximum multiplicity.
(iv) Aufbau principle.

Answer 1

(ii) Heisenberg's uncertainty principle  -  is the answer.

Answer 2

Answer:

Heisenberg’s uncertainty principle is capable to rule out the existence of "definite paths" or "trajectories of electrons".

Explanation:

• The dual nature of electron post some restrictions on the simultaneous and accurate determination of its conjugate properties such as position and velocity or position and momentum.
• Werner Heisenberg, a German physicist, solved over this problem and proposed a principle in 1927, known as Heisenberg's Uncertainty Principle.
• It is stated as it is not possible to determine simultaneously the position and momentum of a moving microscopic particle with absolute accuracy.
• According to this principle the position and velocity of an electron cannot be restricted concurrently with accuracy which rules out the existence of fixed paths.