Finish 1s electron lab, orbital diagrams, Hund

1
Finish 1s electron lab, orbital diagrams, Hunds
rule, Pauli exclusion, valance electrons
2

• Objective
• Today I will be able to
• Construct a model of where electrons in the 1s
  orbital are located.
• Explain the behavior of electrons based on
  Paulis exclusion Principle and Hunds Rule
• Illustrate the location of an electron by drawing
  an orbital diagram
• Identify the location of valance electrons in an
  atom
• Evaluation/ Assessment
• Informal assessment student responses when
  reviewing electron configuration problems,
  orbital diagrams and valence electrons. Listening
  to group interactions on practice sheets and lab
• Formal Assessment collecting and analyzing
  responses to electron configuration worksheet 2
  and the where is the electron lab. Reviewing
  responses to the exit ticket

3
Lesson Sequence

• Warm Up
• Explore Students will be sorted into groups and
  will complete the where is the 1s electron lab
  located
• I will be assessing students progress during the
  lab as I monitor group discussions
• Evaluate Students will complete an electron
  configuration WS (assessment)
• Explain principles, rules and diagrams of
  electron configurations

• Elaborate Students complete orbital diagrams
  worksheet
• Evaluate Students will draw orbital diagrams on
  the board and explain their answers (informal
  assessment)
• Explain Valance Electrons Notes
• Elaborate Students complete a valance electrons
  worksheet
• Evaluate Students will share responses to the
  worksheet
• Exit Ticket

4
Warm - Up

• Write the electron configuration
• for the following elements
• Magnesium
• Iron
• Arsenic
• What is the abbreviated configuration for Sulfur?
  

5
Objectives

• Today I will be able to
• Construct a model of where electrons in the 1s
  orbital are located.
• Explain the behavior of electrons based on
  Paulis exclusion Principle and Hunds Rule
• Illustrate the location of an electron by drawing
  an orbital diagram
• Identify the location of valance electrons in an
  atom

6
Homework

• Finish Orbital Diagrams WS

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Agenda

• Warm Up
• Finish Lab (15 minutes)
• Electron Configuration Practice
• Notes Pauli Exclusion Principle, Hunds Rule,
  Orbital Diagrams
• Orbital Diagram Practice
• Review Practice as a class
• Valence Electron Notes
• Valance Electron Practice
• Exit Ticket

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Finish the where is the electron lab?

• When you finish the lab, hand in one copy per
  group.
• Staple together your lab sheet, the answers to
  the questions, your graph and your target.
• Turn it in on my desk and take a copy of the
  electron configurations practice worksheet and
  begin to work on it.

9
Complete the Electron Configuration Practice
Worksheet

• Hand in upon completion

10
Electron Configuration Rules and Principles
11
Pauli Exclusion Principle

• An orbital can hold a max of 2 e-
• To occupy the same orbital, they must spin in
  opposite directions
• If 2 e- occupy an orbital, they are said to be
  paired
• If only 1 e- is present in an orbital, it is
  unpaired

12
Pauli Exclusion Principle
13
Hunds Rule

• e- occupy orbitals so that a max number of
  unpaired e- result
• More stable arrangement

14
Orbital Diagram

• Shows the electrons in their sublevels
• Represented with arrows

15
Orbital Diagram
1s
2s
2px
2py
2pz

• H

?
?
?
He
C
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
?
Ne
16
Complete the Electron Configuration and Orbital
Diagram Practice Worksheet
17
Review the Electron Configuration and Orbital
Diagram Practice Worksheet
18
Valence Electron Notes
19
Valence Electrons

• Electrons in the outermost energy level
• Determines the number of electrons an atom gains,
  loses, or shares
• These are the electrons that are involved in
  bonding

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Valence Electrons (skip)

• Write the electron configuration for oxygen
• 1s2 2s2 2p4
• Oxygen has six valence electrons (2s2 and 2p4)

21
Valence Electrons (skip)

• Write the electron configuration for potassium
• 1s2 2s2 2p6 3s2 3p6 4s1
• Potassium has 1 valence electron (4s1)

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Valence Electrons

• Exceptions are the d and f sublevels! Use the
  number of electrons in the last s sublevel (and
  the p sublevel, if available)
• Write the electron configuration for Bromine
• 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
• Bromine has seven valence electron (4s2 and 4p5)

23
Foreshadowing Octet Rule

• Most atoms want 8 electrons in their outermost
  level OR full s and/or p sublevels
• Atoms will form bonds to achieve the desired
  amount of electrons
• Atoms are most stable when they have a full outer
  shell

24
Complete Valence Electrons Worksheet
25
Review Valence Electrons Worksheet as a class
26
Exit Ticket

• For the element Chlorine
• Write the electron configuration
• Write the abbreviated electron configuration
• Draw an orbital diagram
• Explain why you drew the electrons in the
  location of the orbital's that you did
• Determine the number of valence electrons