Question

HeLLo guys!!❤

⏩What do you mean by Aufbau's principle??​

Answer 1

The Aufbau principle, simply put, means electrons are added to orbitals as protons are added to an atom. The term comes from the German word "aufbau", which means "built up" or "construction". Lower electron orbitals fill before higher orbitals do, "building up" the electron shell.

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