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Question

The statement "No two electrons in an atom can have all the four quantum numbers identical" is known as the__________.
  1. Pauli's exclusion principle
  2. Hund's rule
  3. Aufbau Principle
  4. Heisenbergs principle

A
Hund's rule
B
Pauli's exclusion principle
C
Aufbau Principle
D
Heisenbergs principle
Solution
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According to Pauli's exclusion principle, it is impossible for two electrons of a poly-electron atom to have the same values of the four quantum numbers: n, the principal quantum number, l, the angular momentum quantum number, m, the magnetic quantum number, and s, the spin quantum number.

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