1. Warm-up
Draw the energy filling diagram 3 times on your warm-up sheet. DO THIS FROM MEMORY IF POSSIBLE!!!!!

2. Warm-up Write the ABBREVIATED electron configuration for calcium.
TURN IN YOUR WARM-UP SHEET
Take out your abbreviated electron configuration notes from yesterday

3. Abbreviated Electron Configurations

4. Noble Gas Configurations
He: 1s2
Ne: 1s22s22p6
Ar: 1s22s22p63s23p6
Kr: 1s22s22p63s23p64s23d104p6
Xe: 1s22s22p63s23p64s23d104p65s24d105p6
Rn: 1s22s22p63s23p64s23d104p65s24d105p66s24f145d106p6

5. Abbreviated Configuration
Shows only the electrons in the highest energy orbitals
Most importantly the valence electrons
Element in brackets is the noble gas at the end of the row above the element
This represents the core electrons of the atom

6. Practice!
Ra: 88 electrons
[Rn]7s2
Fe: 26 electrons
[Ar]4s23d6

7. Practice! Sn: 52 electrons W: 74 electrons [Kr]5s24d105p2
[Xe]6s24f145d4

8. Practice!
[Kr]5s24d9
Silver (Ag)
[Ar]4s23d104p1
Gallium (Ga)

9. Practice!
[He]2s22p5
Fluorine (F)
[Rn]7s25f10
Californium (Cf)