Chemistry Honors – Class 17

Dates

• Periods A, C – Friday, September 27th
• Period D – Monday, September 30th

Quantum Numbers

• Write down your home address – why is this unique?
• Elements (within atom) have unique address
• Defined by Four principal Quantum Numbers
  • n = principal quantum number
  • l = shape quantum number
  • ml = orientation quantum number
  • ms = spin quantum number
• Rules for allowed values
  • n  = 0, 1, 2, 3…
  • l = 0 to (n-1)
  • ml = +l to -l (including all digits in between)
  • ms = +1/2 or -1/2
• Activity
  • write a table that includes all of the QN for first three energy levels
  • how many different possibilities exist?
• Connections
  • what patterns exist?
  • how might they relate to the Periodic Table?
  • meaning of “l” quantum number
• Showing Orbitals
  • The Orbitron
  • putting it all together – orbitals, quantum numbers

Homework

• Ch. 11 Notes: 11.9 – 11.10
• Ch. 11 (29 – 44)