Aufbau Diagram. Here n refers to the principal quantum number and l is the azimuthal quantum number. Orbital diagrams and electron configurations for li be with emphasis on aufbau pauli.
According to the aufbau diagram the configuration should be 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 1 and indeed it is. In this way the electrons of an atom or ion form the most. Electron pairs are shown with arrows pointing in opposite directions.
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Here n refers to the principal quantum number and l is the azimuthal quantum number. In this way the electrons of an atom or ion form the most. Here n refers to the principal quantum number and l is the azimuthal quantum number. The aufbau principle from the german aufbauprinzip building up principle also called the aufbau rule states that in the ground state of an atom or ion electrons fill atomic orbitals of the lowest available energy levels before occupying higher levels.
