1. Electron Configurations – a Review and More…

2. Electron Configurations
e- configuration notation:
Reminder – this notation uses # of e- in a sublevel as a superscript over the sublevel (block) designation

3. Electron Configurations
e- configuration notation:
Write complete e- configuration notation for elements 2, 6, & 16
He: 1s2
C: 1s2 2s2 2p2
S: 1s2 2s2 2p6 3s2 3p4

4. Electron Configurations
e- configuration notation (noble gas shortcut):
Reminder – this version uses a noble gas (group 18) “core” instead of beginning at 1s

5. Electron Configurations
e- configuration notation (noble gas shortcut):
Write noble gas shortcut for elements 12, 21, & 35.
Mg: [Ne] 3s2
Sc: [Ar] 4s2 3d1
Br: [Ar] 4s2 3d10 4p5

6. Electron Configurations
e- dot notation:
simplest notation, only shows valence e- (e- that may be lost, gained, or shared when chemical compounds are formed - they are from s & p blocks)

7. Electron Configurations
e- dot notation:
Draw dot diagrams for elements 1-10