Reviewing what we went over Wednesday:

Arrangements of particles in solids, liquids and gases.

A nice image of what sublimation might look like at the atomic level:

One way to draw the molecules of solids, liquids and gases:

Another way to visual s, l and g:

Notes from B2W3D1 - States of matter

Here are Monday's notes. As always, be sure to check out the speaker's notes, which contain important extra info!

By popular demand

I'll start making the weekly syllabi available the previous Friday.

Here's the B2W3 Syllabus (along with the rubric for J). Enjoy.

Notes from B2W2D1

On Monday, before starting in on assignment "H," we went over the basic definitions of chemical elements and compounds.

Elements: the ancient Greeks thought that there were only four elements: earth, air, fire and water. They thought that every substance was made of some combination of those four.

However, thousands of years of chemistry experiments showed that those four "elements" weren't as simple as the Greeks had thought; water, air, and earth, for instance, could all be broken down into simpler "ingredients."

However, as chemists worked, they built up a list of materials that couldn't be separated into more basic ingredients. They called these materials the chemical elements. It turns out that there are 92 naturally-occuring elements that are the building blocks of all matter. There are 92 naturally-occuring kinds of atoms, and all matter is made of some combination of those kinds. (There are also elements beyond 92, but those are artificial - made if physics and chemistry labs.)

You can think of elements as tiny "Legos;" there are 92 kinds, all different from one another. Everything made of matter - all solids, liquids, and gases - are made of these elements, in different combinations.

A compound is a material whose molecules are made of more than one kind of element. A compound is still a pure substance - it's NOT a mixture. Every molecule of a compound is like every other molecule. But each molecules is made of more than one kind of element.

H2O (water), for example, is a compound. Each molecule of water is made of two atoms of hydrogen and one of helium.

In project H, you'll be investigating other compounds.

Another write-up on elements can be found at here, at Chem4Kids.

Here's the syllabus for this week.

Here's assignment H (and the rubric)

Here's assignment I (rubric included).

Assignment F

The in-class worksheet for Assignment F is here.

If you're out sick this week, you can still do assignment F; you won't have the actual substances, but you should be able to use yesterday's notes to identify the substances on the list.

Notes for B2W1D3

The notes on "Pure Substances and Mixtures" are up.

Please don't forget to look at the Speaker Notes! There's lots of helpful info there.

Also, check out the last page: a list of helpful web links!

Notes for W1D2

The notes from Tuesday are here.

I highly recommend you look over these and fill out anything you're missing or were unclear on. These notes should give you all you need to do Assignment E.

Materials for Block 2, Week 1

Syllabus of this week's assignments.

Lab Safety Rules.

Rubrics for assignments E, F and G.

Please note: Assignments E and F will mostly be done in class; so take good notes and use your time wisely!

Also please note: from now on, assignments that are marked "N" ("needs revision") on the rubric will be marked as "Incomplete" in Snapgrades. This should make it easier for you to keep track of work you need to do.