Question

what is Hunds rule ,aufbau principle and Pauli 's exclusion principle ?​

Answer 1

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Aufbau Principle: lower energy orbitals fill before higher energy orbitals. Hund's Rule: one electron goes into each until all of them are half full before pairing up. Pauli Exclusion Principle: no two electrons can be identified by the same set of quantum numbers (i.e. must have. different spins

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Answer 2

Answer:

Aufbau Principle: lower energy orbitals fill before higher energy orbitals. Hund's Rule: one electron goes into each until all of them are half full before pairing up. Pauli Exclusion Principle: no two electrons can be identified by the same set of quantum numbers (i.e. must have. different spins).