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Chem 11 – Class Starter. Please take out your Periodic Table “cut-ups ” and place them on your table If this makes more sense, why are periodic tables laid out the way they are ? Practicality…. Soon… this “alternative” model of the Periodic Table will become very important to us….

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Chem 11 – Class Starter

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Chem 11 class starter
Chem 11 – Class Starter

Please take out your Periodic Table “cut-ups” and place them on your table

If this makes more sense, why are periodic tables laid out the way they are?

Practicality…



Intro to quantum mechanics
Intro to Quantum Mechanics will become very important to us…

Video


Where were were
Where were were…? will become very important to us…

Collect the Quantum Revolution Worksheet from the front of the room

In about 8 minutes we will review as a class


Unfortunately
Unfortunately… will become very important to us…

  • Bohr’s model on worked for one specific molecule…

    Hydrogen

  • So what’s so unique about Hydrogen?

    One electron system

  • We can’t have a model that works for only one ATOM!


One more thing waves vs particles
One more thing… Waves vs. Particles will become very important to us…

  • Is light a wave or a particle?

  • Is an electron a wave or a particle?

BOTH ARE BOTH!?!


Wave particle duality
Wave-Particle Duality will become very important to us…


Finally the modern model of the atom
Finally…. the MODERN MODEL of the atom will become very important to us…

It took several years, several scientists, and some outside the box thinking to develop the current model of the atom…


Video nova quantum mechanics probability density
Video: NOVA - Quantum Mechanics - Probability Density will become very important to us…


Chem 11 class starter

Population Density of BC will become very important to us…

If you had to make a bet (non monetary of course) on finding a specific person, when you have no prior knowledge of where they live, where in BC would you choose?


Chem 11 class starter

Bohr Theory will become very important to us…

The electron is a particle that must be in orbital in the atom.

Quantum Theory

The electron is like a cloud of negative energy or a wave.

Orbitals are areas in 3D space where the electrons most probably are.

The energy of the electron is in its vibrational nodes- like notes on a guitar string.

Photons are produced when high energy nodes change to lower energy nodes


We now not only have shells
We now not only have shells… will become very important to us…

We now have subshells within shells…

Oh and by the way… even though they are called shells they are ACTUALLY probability densities


Chem 11 class starter

  • S orbitals will become very important to us…

  • Each orbital holds 2 electrons


Chem 11 class starter

  • P orbitals will become very important to us…

  • There are 3 suborbitals

  • Each contains 2 electrons

  • Total electrons = 6


Chem 11 class starter

  • D orbitals will become very important to us…

  • There are 5 suborbitals

  • Each contains 2 electrons

  • Total electrons = 10


Chem 11 class starter

  • F orbitals will become very important to us…

  • There are 7 suborbitals

  • Each contains 2 electrons

  • Total electrons = 14



Chem 11 class starter

7p electrons..

6d

5f

7s

n = 7

6p

5d

4f

6s

n = 6

5p

4d

5s

n = 5

4p

3d

4s

n = 4

3p

3s

Energy levels

n = 3

The Electron Energy Levels for a Polyeletronic Atom

2p

2s

n = 2

Energy Levels

n = 1

1s


Homework
Homework: electrons..

  • Hebden: Read p. 151-157 Q’s 26-29 odds


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