Electron Configuration

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Presentation transcript:

Electron Configuration

Valence Electron This atom has 8 valence e- e- on the outermost orbit/energy level/ring This atom has 8 valence e-

Rules for Electron Configuration Hund Everyone get e- before 1 gets 2 Aufbau e- added to lowest Energy Level 1st one @ a time Pauli Max of 2 e-, spin opposite directions

Energy Levels This atom has three energy levels Most of the time = row number Known as: Orbit or the Ring Quantum Number = n This atom has three energy levels

Sub-level Blocks: s, p ,d, f Area or “Block” of the periodic table Represents electron cloud shape Quantum Number = l Blocks: s, p ,d, f

1 Start 2 3 4 5 6 7

Each Sub-level (Block) tells us the shape of the electron cloud: Energy max # of e- present # shapes Shapes s Least 2 1 p 6 3 d 10 5 --------------------------------clover leaf---------------------------------- f Most 14 7 ----------------------------------Too complex-------------------------------

D orbital shapes

F orbital shapes

Electron Configuration Level block #electrons H= 1s1

Element # e- e- config # E level # valence e- H He Li Be

Element # e- e- config # E level # valence e- B C N O F Ne

1 Start 2 3 4 5 6 7

Element # e- e- config # E level # valence e- Ca V Ni Ge Se