Section 5.3. Electron Configurations. Electron Configurations. Atom is in the ground state 3 rules or laws Aufbau principle Pauli Exclusion principle Hund’s Law. Aufbau Principle. Electrons occupy lowest energy orbital available All orbitals of a sublevel are equal energy
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Which orbital will fill first, 4s or 3d?
1s 2s 2p 3s 3p 4s
3d 4p 5s 4d 5p 6s
4f 5d 6p 7s 5f 6d 7p
1. Electron Configuration Notation
2. Noble Gas Notation
3. Orbital Diagrams
1s2 2s22p6 3s23p6 4s23d10