Chem 11 class starter
Sponsored Links
This presentation is the property of its rightful owner.
1 / 20

Chem 11 – Class Starter PowerPoint PPT Presentation


  • 60 Views
  • Uploaded on
  • Presentation posted in: General

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….

Download Presentation

Chem 11 – Class Starter

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


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…


Intro to Quantum Mechanics

Video


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…

  • 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

  • Is light a wave or a particle?

  • Is an electron a wave or a particle?

BOTH ARE BOTH!?!


Wave-Particle Duality


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


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?


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 have subshells within shells…

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


  • S orbitals

  • Each orbital holds 2 electrons


  • P orbitals

  • There are 3 suborbitals

  • Each contains 2 electrons

  • Total electrons = 6


  • D orbitals

  • There are 5 suborbitals

  • Each contains 2 electrons

  • Total electrons = 10


  • F orbitals

  • There are 7 suborbitals

  • Each contains 2 electrons

  • Total electrons = 14


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


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:

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


  • Login