Special Topics for SOL 2 3 rd Power Point. Periodic Trends (Chap 14). Shorthand Electron Configurations. Shorthand configurations are a useful tool. Let’s look at an example for Y, Z=39 The electron configuration for yttrium is 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 10 4p 6 5s 2 4d 1
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Special Topics for SOL 23rd Power Point
Periodic Trends (Chap 14)
Br[Ar]3d104s2 4p5I[Kr]4d105s2 5p5
At[Xe]4f14 5d106s2 6p5
Na = 1s22s22p63s1
White = inner core electrons and Blue = Valence electrons
Note the trends are opposites. Draw some arrows on your periodic table to help you remember the trends.