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Happy Monday!.  Electron Configurations!  Last week of 1 st Quarter Lab Reports due WEDNESDAY!! Chapter 3.3 (Part 2) Test = THURSDAY!. Quantum Number. A number that specifies the properties of electrons Every electron has 4 quantum numbers

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Happy monday
Happy Monday!

 Electron Configurations! 

  • Last week of 1stQuarter

  • Lab Reports due WEDNESDAY!!

  • Chapter 3.3 (Part 2) Test = THURSDAY!


Quantum number
Quantum Number

  • A number that specifies the properties of electrons

  • Every electron has 4 quantum numbers

  • Most importantly, it specifies the orbital in which the electron is located



Energy levels sublevels and orbitals
Energy Levels, Sublevels, and Orbitals

  • Energy Levels (represented by principle quantum number - n)

    • Higher the n, the farther away from the nucleus

      (More Energy)

  • Sublevels (s,p,d,f)

    • Number of sublevels is related to the energy level

  • Orbitals

    • Make up sublevels



Sooo….

  • Energy levelsare made up of..

    • Sublevels which are made up of..

      • Orbitals!





Orbitals
Orbitals

  • Orbital:

    • Most probable location of electrons (90% chance)

    • Each orbital can hold a maximum of 2 electrons

  • Each region corresponds to a specific energy level (n)

  • Sometimes called electron clouds


Orbitals1
Orbitals

  • Described by both a number and a letter

    • Number – tells the energy level in which the orbital is located

    • Letter – tells the shape of the orbital

  • The higher the energy level, the more different shapes that are possible







Orbitals3
Orbitals

  • How do these orbitals fit together?

  • Watch this…

  • And this…



P 4 in packet o fun1
p.4 in Packet O Fun!


P 4 in packet o fun2
p.4 in Packet O Fun!


P 4 in packet o fun3
p.4 in Packet O Fun!




Electron configurations
Electron Configurations!

  • An electron configuration is the arrangement of electrons in an atom


Orbital labels examples
Orbital Labels:(examples)

  • 1s

  • 2s

  • 2p

  • The number tells us the energy level

  • 3s

  • 3p

  • 3d

  • The letter tells us the orbital shape!


Happy tuesday
Happy Tuesday!!

  • Talk about Conclusions

  • Electron Configurations

    Lab Report due tomorrow TYPED

    Chapter 3.3 (part2) Test = Thursday


Aufbau principle
Aufbau Principle

  • Electrons fill the lowest-energy orbital first


The order in which orbitals are filled (Aufbau principle) may be also be displayed as an arrow diagram:

1s

2s 2p

3s3p 3d

4s 4p4d 4f

5s 5p5d 5f

6s 6p6d 6f

7s 7p7d 7f

1s

2s 2p

3s 3p 3d

4s 4p 4d 4f

5s 5p 5d 5f

6s 6p 6d 6f

7s 7p 7d 7f


Pauli exclusion principle
Pauli Exclusion Principle

  • Two electrons of opposite spins can occupy the same orbital


Hund s rule
Hund’s Rule

  • The number of unpaired electrons is the maximum possible and these unpaired electrons must have the same spin

    • (Must fill each orbital with 1 electron–all with the same spin–before doubling up).


Orbital diagram
Orbital Diagram:

Lowest Energy Level
















Draw a horizontal orbital diagram for oxygen
Draw a Horizontal Orbital Diagramfor Oxygen:

2p

1s

2s


Draw a horizontal orbital diagram for chlorine
Draw a Horizontal Orbital Diagramfor Chlorine:

  • Cl:

    1s22s22p63s23p5

2p

1s

2s

3p

3s



Remember the arrow d iagram
Remember the Arrow Diagram:

1s

2s 2p

3s3p 3d

4s 4p4d 4f

5s 5p5d 5f

6s 6p6d 6f

7s 7p7d 7f

1s

2s 2p

3s 3p 3d

4s 4p 4d 4f

5s 5p 5d 5f

6s 6p 6d 6f

7s 7p 7d 7f


Practice using it
Practice using it!

  • Follow the arrows to write on the electron configurations on the bottom of p.12




Electron configuration practice
Electron Configuration Practice

  • Practice writing configurations based on Periodic Table Method – p.13

  • Homework if not finished.


Happy wednesday
Happy Wednesday!!

  • Finish Electron Configurations!

    • More Periodic Table Method Practice

    • Exceptions

    • Noble Gas Simplification/shortcut

  • Lab Reports Typed due TODAY!!

    • Turn in on front table

  • UPDATE: Ch.3 Pt.2 Test FRIDAY!


Exceptions to the rule
Exceptions to the Rule

  • Cr and Mo

    • s1d5

  • Cu, Ag, Au

    • s1d10


Noble gas shortcut
Noble Gas Shortcut

  • A noble gas has a full outer shell (s and p orbitals)

  • So, we can use the noble gas symbol to represent all of the inner layers of the atom, and then show what we have added to it


Noble gas shortcut1
Noble Gas Shortcut:

[Noble gas that comes before the element]

+ additional electrons

Ex: Chlorine

instead of… 1s22s22p63s23p5

Noble Gas shortcut Method = [Ne]3s23p5



Ions!!

  • Remember how to find your number of electrons in ions!!

    K+ = how many electrons?

    Cl- = how many electrons?

    O2- = how many electrons?


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