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27 February, 19:02

When filling degenerate orbitals, electrons fill them singly first, with parallel spins is known as When filling degenerate orbitals, electrons fill them singly first, with parallel spins is known as:

A. Hund's rule

B. Heisenberg uncertainty principle

C. Aufbau principle

D. Pauli exclusion principle

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  1. 27 February, 19:23
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    Answer : The correct option is, (A) Hund's rule

    Explanation:

    Hund's rule : It states that the electrons are singly filled first in each orbital having same spin, then only pairing occurs.

    Heisenberg uncertainty principle : It is defined as the position and the momentum both can not be determined simultaneously.

    Aufbau principle : It states that the atom or ion that present in the ground state, the lowest energy level will be filled first before occupying the higher levels.

    Pauli Exclusion Principle : It states that no two electrons present in an atom or a molecule can have the same set of the four quantum numbers.

    Hence, the correct option is, (A) Hund's rule
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