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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…


Soon this alternative model of the periodic table will become very important to us

Soon… this “alternative” model of the Periodic Table will become very important to us…


Intro to quantum mechanics

Intro to Quantum Mechanics

Video


Where were were

Where were were…?

Collect the Quantum Revolution Worksheet from the front of the room

In about 8 minutes we will review as a class


Unfortunately

Unfortunately…

  • 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

  • Is light a wave or a particle?

  • Is an electron a wave or a particle?

BOTH ARE BOTH!?!


Wave particle duality

Wave-Particle Duality


Finally the modern model of the atom

Finally…. the MODERN MODEL of the atom

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


Chem 11 class starter

Population Density of BC

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

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…

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

  • Each orbital holds 2 electrons


Chem 11 class starter

  • P orbitals

  • There are 3 suborbitals

  • Each contains 2 electrons

  • Total electrons = 6


Chem 11 class starter

  • D orbitals

  • There are 5 suborbitals

  • Each contains 2 electrons

  • Total electrons = 10


Chem 11 class starter

  • F orbitals

  • There are 7 suborbitals

  • Each contains 2 electrons

  • Total electrons = 14


Next class we will learn to fill these orbits with electrons

Next class we will learn to fill these orbits with electrons..


Chem 11 class starter

7p

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:

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


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