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Workshop: Electron Configurations

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1 Workshop: Electron Configurations
Forensic Chemistry By PresenterMedia.com

2 Noble Gas Configurations
Also known as Shorthand Notation Step 1 Find the closest noble gas to the atom (or ion) with LESS electrons Step 2 Write the symbol for the noble gas in brackets [ ] Step 3 Find the electron configuration that the noble gas and the atom (or ion) have in common Step 4 After the brackets, write the part of the atom (or ion)’s e-config. that is NOT in the noble gas Step 5 Count the number of electrons to check if they match the total number needed

3 Practice Noble Gas Configuration
……. Or Shorthand Notation Practice Noble Gas Configuration Cl K Ca I Bi Electron Configuration Noble Gas Configuration - 1s22s22p63s23p5 - 1s22s22p63s23p64s1 - 1s22s22p63s23p64s2 - 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 1s22s22p63s23p63d104s24p64d105s25p64f145d106s26p3 [Ne] 3s23p5 [Ar] 4s1 [Ar] 4s2 [Kr] 4d105s25p5 [Xe] 4f14 5d10 6s2 6p3

4 Exceptions to the Aufbau Principle
Says electrons fill lowest energy levels first Atoms are MORE stable when they have their d-shell “half-filled” Cr has [Ar]4s13d5 Mo? Atoms are MORE stable when they have their d-shell “filled” Cu has [Ar]4s13d10 Ag ? Au ?

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