Question

state the postulates of Aufbau principles​

Answer 1

Answer:

The Aufbau principle, simply put, means electrons are added to orbitals as protons are added to an atom. ... Lower electron orbitals fill before higher orbitals do, "building up" the electron shell. The end result is that the atom, ion, or molecule forms the most stable electron configuration.

Answer 2

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The Aufbau principle, simply put, means electrons are added to orbitals as protons are added to an atom. ... Electrons obey Hund's rule, which states that electrons spread out before they pair up if there are two or more energetically equivalent orbitals (e.g., p, d).

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