CH09 – Quantum Numbers

Dates

• P4 – Friday, September 15th
• P5 – Friday, September 15th
• P7 – Monday, September 18th

Orbitals – What do we know?

• where likely to be found
• “time-lapse” of electron position
• overlap of different electrons (because orbitals are not objects)
• could actually be anywhere

Orbitals – More definition

• within an atom, each electron has its own orbital “space”
• there are rules for where elctrons can be
• Characteristics: size, shape, orientation, spin
• Size: whole number ordinals, start with “1”, increase = more energy larger space
• Shape: s, p, d, f (indicate the shape of the orbital)
• Orientation: can be aligned with different axes
• Each orbital can hold 2 electrons, with different spin
• Each characteristic has a quantum muber (with rules)

Coolest Web Site Ever

• The Orbitron [LINK]
• Can visualize the orbitals
• Also pictures in the book

How do write quantum mumbers

• QN Table
• Fill out table
• Write QN for lowest 25 electrons

Homework

• Finish QN table