1. Electron Configuration Methods for expressing electron locations: 1.Configuration 2.Orbital Notation

2. Electron Configuration

3. Practice 1.What element has the noble-gas notation [Xe]6s 2 ? 2. What is the configuration for Bismuth? Barium

4. Orbital Notation Another method of visually depicting locations of electrons and their spin in orbits Atomic Orbital – like an electron parking spot Uses Boxes and Arrows

5. Orbital Notation Rules 1.e- occupy orbitals of lowest energy first Aufbau Principle 2. orbitals hold two electrons with opposite spin   Pauli’s Exclusion 3. Loners First, Partners Second Hund’s Rule

6. ORBITAL NOTATION We can also use diagrams with arrows to show electrons and their spin in a diagram called orbital notation. Each block represents an orbital (like an electron parking spot). 1 atom of Li # of P + = 3 # of e- = 3   

7. 1 atom of F # of P + = 9 # of e- = 9       LONERS FIRST PARTNERS SECOND OPPOSITE SPIN OCCUPY LOWEST ENERGY FIRST BEFORE MOVING TO HIGHER ENERGY LEVEL

8. ORBITAL NOTATION YOU TRY SULFUR!