1. Quantum Numbers

2. Identify the properties of the 4 types of quantum numbers
Objective
Today I will be able to:
Draw correct orbital diagrams for an atom/ion
Identify the properties of the 4 types of quantum numbers
Determine the quantum numbers for various electrons in an atom
Evaluation/ Assessment
Informal assessment – student responses when reviewing quantum numbers problems
Formal Assessment – collecting and analyzing students responses to quantum on the practice sheets

3. Lesson Sequence Warm – Up
Explore: Students will use a textbook to research the four types of quantum numbers
Explain: Quantum Numbers
Elaborate: Writing quantum numbers practice
Evaluate: Review quantum numbers practice
Explain: Electromagnetic spectra calculations
Elaborate: Electromagnetic spectra calculations
Exit Ticket

4. Warm - Up What are valance electrons?
How many valance electrons are there in the following elements: Mg O Ge Cr
Draw the orbital diagram for Phosphorous.

5. Warm - Up What are the 4 quantum numbers?
What is the definition of the principle quantum number?
What is the symbol?

6. Objective Today I will be able to:
Draw correct orbital diagrams for an atom/ion
Determine the quantum numbers for various electrons in an atom

7. Homework
STEM Fair Conclusion Due November 14

8. Agenda Warm – Up Review Orbital Diagrams Review Valance Electrons
Quantum Numbers
Spectrum Calculations
Exit Ticket

9. Quantum Numbers Activity

10. Quantum Numbers Like giving each electron its own address
Quantum numbers tell us properties of the atomic orbitals, and electrons, in an atom.
Like giving each electron its own address
An orbital is a 3-D region of an atom where there is a high probability of finding electrons (NOT an actual ring & NOT like the planetary orbitals)

11. Principal Quantum Number Angular Momentum Quantum Number
Magnetic Quantum Number
Spin Quantum Number

12. Textbook
You will need a textbook to look up information about the quantum numbers.

13. Know for each Quantum # Definition Symbol The allowed values
An example
A visual representation of the quantum number

14. Review Quantum Numbers as a Class
Discussion of the 4 types of quantum numbers and there properties

15. Quantum Number Review Notes

16. Quantum Numbers Used to describe various properties of the orbitals
Each electron is assigned a set of four quantum numbers which, in order, are n, l, ml , and ms
Like giving each electron its own address

17. Principle quantum number
Definition: indicates the main energy level occupied by the electron
Symbol: n
Values: (written as integers) 1,2,3,4,5,6,7

18. Angular Momentum Quantum Numbers
Definition: indicates the shape of the orbital
Symbol: l
Values:
0 = s
1 = p
2 = d
3 = f
For a specific energy level, the number of orbital shapes available is equal to n -1

19. Magnetic Quantum Numbers
Definition: represents the orientation of an orbital around the nucleus
Symbol: ml
Values: for a p-orbital -1, 0 , 1

20. Spin Quantum Numbers
Definition: represents the spin states of electrons in an orbital
Symbol: ms
Values: +1/2, - ½

22. Can an e- be described by the following set of quantum numbers?
n=2, l=1, ml= -1
All quantum numbers are allowed values

23. Can an e- be described by the following set of quantum numbers?
n=1, l=1, ml= +1
Not possible.
The value of l must be less than the value
of n.

24. Can an e- be described by the following set of quantum numbers?
n=7, l=3, ml= +3
All the quantum numbers are allowed
values.

25. Can an e- be described by the following set of quantum numbers?
n=3, l=1, ml=-3
Not possible.
The value of ml must be in the range
-l to +l

26. Replace the ? Mark with an appropriate quantum number.
n=3, l=1, ml=?
n=4, l=?, ml=-2
n=?, l=3, ml=?

27. Can an e- be described by the following set of quantum numbers?
n=2, l=1, ml=-2
n=3, l=2, ml=+2
n=4, l=3, ml=+3
n=5, l=2, ml=+3

28. Writing Quantum Numbers
You can identify the quantum numbers for any electron in an element
Start by writing out the the electron configuration and orbital diagram for the element
Locate the electron in the orbital diagram that you are solving the quantum number for
Determine the 4 quantum numbers

29. Hydrogen’s electron Write electron configuration Draw orbital diagram
ml= 0
ms= +1/2

30. Helium’s second electron
Write electron configuration
Draw orbital diagram
n= 1
l= 0
ml= 0
ms= -1/2

31. Lithium’s third electron
Write electron configuration
Draw orbital diagram
n= 2
l= 0
ml= 0
ms= +1/2

32. Flourine’s 6th electron
Write electron configuration
Draw orbital diagram
n= 2
l= 1
ml= 0
ms= +1/2

33. Exit Ticket
What are the quantum numbers for the last electron in Neon?