Notes 4-2 Electron Configuration notes orbital diagram.docx...

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Notes 4-2 Electron Configurations Electron configuration : shows the arrangement of electrons within the orbitals of an atom describes _____________________ are found and _________________________they possess electron configurations of an atom are determined by o distributing ____________________among energy levels (n) and shapes based on a set of stated principles use an orbital energy diagram to determine: Example: The Aufbrau Principle: Correct Incorrect The Pauli Exclusion Principle: Hund’s Rule:
O (Oxygen) ____ ____ ____ ____ 3p 3s ____ ____ ____ ____ 2p 2s ____ 1s As (Arsenic) ____ ____ ____ 4p ____ ____ ____ ____ ____ ____ 3d 4s ____ ____ ____ ____ 3p 3s ____ ____ ____ ____ 2p 2s ____ 1s
Co (Cobalt) ____ ____ ____ ____ ____ ____ 3d 4s ____ ____ ____ ____ 3p 3s ____ ____ ____ ____ 2p 2s ____ 1s Ni (Nickel) ____ ____ ____ 4p ____ ____ ____ ____ ____ ____ 3d 4s ____ ____ ____ ____ 3p 3s ____ ____ ____ ____ 2p 2s ____ 1s Electron configurations can be written without using an orbital diagram. These follow the same rules as before. This is what this shortened version looks like: Example: 1s 2 2s 2 2p 6 3s 2 This version gives us the total valence electrons in each orbital, but does not give information about the spin of the electrons. Write the electron configuration for: N: Cu: Mn: Ca: Sn: Try these on your own and compare with those around you: Mg
F P Sr

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