World of Chemistry

The following video shows a very good animation of the different molecular geometries caused by the interaction (repulsion) of the electron pairs creating bonds inside molelcules.

NOTE: In the second half of the video, the presenter discusses what happens when there are "d" orbitals involved in the valence level; although this is NOT required for our class discussion, you may find it interesting to watch.

This presentation includes the materials reviewed in class:

This presentation includes the materials reviewed in class:

This presentation includes the materials reviewed in class:

This presentation includes the materials reviewed in class:

This presentation includes the materials reviewed in class:

This presentation includes the materials reviewed in class:

Here is the presentation we reviewed in class:

Here is the presentation we reviewed in class:

Here is the presentation we reviewed in class:

Here is the presentation we reviewed in class:

Here is the presentation we reviewed in class:

NOBEL PRIZE IN PHYSICS
Russian-born scientists shared the Nobel Prize in physics on Tuesday (October 5) for "groundbreaking experiments'' with the thinnest, strongest material known to mankind, a carbon vital for the creation of faster computers and transparent touch screens.

See article at this link

NOBEL PRIZE IN CHEMISTRY
American Richard Heck and Japanese researchers Ei-ichi Negishi and Akira Suzuki won the 2010 Nobel Prize in chemistry on Wednesday for developing a chemical method that has allowed scientists to make medicines and better electronics.

See article at this link

Click in the Sharing icon to find a folder with the presentations done by each team about the different atomic models, in the form of PDF documents.  You can download for your review.

Remember, the contents of these presentations IS SUBJECT TO QUIZ.

Here is the presentation we reviewed in class:

These links show a series of videos relating in more detail the different stages in the scientific knowledge of the atom and its structure.  They are worth watching:

• Structure of the Atom 1:  Earliest Models
• Structure of the Atom 2:  Smaller than the Smallest (Dalton, Thompson models)
• Structure of the Atom 3:  The Rutherford Model
• Structure of the Atom 4:  The Bohr Model
• Structure of the Atom 5:  Spectra
• Structure of the Atom 6:  The Wave Mechanical Model

Although the videos are old, and the sound quality is not the best, I think you will find them very informative and easy to understand :)

Here is the presentation we reviewed in class:

And the videos we reviewed as part of the presentation:

Este corto video explica la evolución de los modelos atómicos, desde Dalton al modelo atómico moderno.

You might be interested in the following article from the "National Geographic News" website:

Titanic Bows to Nature

How is that related to Chemistry?  Well, Titanic's hull is mostly made of steel, which is an iron alloy, and it is slowly rusting away and being eaten by microorganisms and fungi that feed on iron oxide.  The strange formations seen in the pictures, which resemble red icicles, are actually made of rust, and were dubbed "rusticles" by oceanographer Robert Ballard, who lead the team that discovered the wreck of Titanic.

A link to a small article on rusticles found in Wikipedia is here.

In this post you will find a basic rubric for all written work.  The requirements described are the MINIMUM acceptable.  Click on the link to download the document to your computer.

Check out the Visionlearning website:

• In this link, you can find additional reading material regarding Matter and Dalton's Theory.
• In this other link, you can find information regarding States of Matter, as well as the simulations linked from the presentation we reviewed on this topic.

Welcome to your first High School year!  I hope you will find it full of challenges and successes, and that you will enjoy the time spent in your first semester.

In this blog, I will provide review materials for topics discussed in class, schedule homework, provide additional exercises or support materials, and interesting links and topics.  I hope you will find it helpful and that you will make full use of it.

Welcome again!