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Unit 4: Atomic and Molecular Models

Our last unit of the First Semester pertains to Models for understanding atoms and molecules. The unit begins with an exploration of quantum models of the atom and their value in explaining chemical and physical properties. The second half of the unit will look at the topic of bonding and make an effort to explain why ionic and molecular compounds form with their specific ratio of atoms.

Lab AMM1 - Elemental Fingerprinting

Our first lab experience is Lab AMM1 - Elemental Fingerprinting. We will observe the line spectrum of four elemets and match the observed spectra to a database of known spectra in order to identify the element. You will find the database of known spectra here:

Some Informative Videos

A list of informative videos (some of which will be shown in class) will be kept here. More can be found on a separate page here.

Lab AMM2 - It's Periodic

Lab AMM2 - It's Periodic is more of a data-analysis activity than it is an actual experimental lab. You will be provided data in a Google Sheet that you will manipulate and graph in order to identify trends in the data and relate such trends to the placement of the elements on the periodic table. In addition to identifying/describing the trends, you will also explain why the trends exist in terms of the electronic structure of the atoms of the various elements. You will produce a Google Doc or Slide Presentation that includes the three graphs, the descriptions of the trends, and the explanation of one of the trends. Directions for this lab and a link to the Google Sheet containing the data are included below.  Links to other pertinent information is also provided:

Three Models of Science

In your explanations of a periodic property, be sure to incorporate an understanding of the three HUGE models of science discussed in class. These models are the Periodic Law, Quantum Mechanics, and Coulomb's Law.

View: Three Models of Science

Lab AMM2 Scoring

Lab AMM2 (or Data Analysis AMM2) will be graded with the rubric shown below:

Scoring Rubric

Worthy Quotes

"I don't like it, and I'm sorry I ever had anything to do with it." - Erwin Schrodinger, commenting on the Probablity Functions of Quantum Mechanics

"The smallest units of matter are not physical objects in the ordinary sense; they are forms, ideas which can be expressed unambiguously only in mathematical language." - Werner Heisenberg

"The truth is, everyone is confused by quantum physics." - David Walton, quantum physicist

"Protons give an atom its identity, electrons its personality." - Bill Bryson, author of A Short History of Nearly Everything

"We have to remember that what we observe is not nature herself, but nature exposed to our method of questioning." - Werner Heisenberg

"It was about three o’clock at night when the final result of the calculation [which gave birth to quantum mechanics] lay before me ... At first I was deeply shaken ... I was so excited that I could not think of sleep. So I left the house ... and awaited the sunrise on top of a rock." - Werner Heisenberg

"There are things that are so serious that you can only joke about them." - Werner Heisenberg

"God doesn't play dice with the universe!" - Albert Einstein

"Einstein, stop telling God what to do!" - Neils Bohr

"If quantum mechanics hasn't profoundly shocked you, you haven't understood it yet." - Neils Bohr

How 'Bout That Test?

Tests have been graded and grades are posted online. If you wish to have a private viewing of your test and the answer key, make an attempt to come in this week ...

Blue days: Blocks 3B, 3C, and 4
Gold days: Before school, Block 4
After School on Wednesday and Thursday

If you would like to see the break down of grades per section and overall. View Grades.

One Cool Infographic

Here is my all-time favorite Infographics (even better than the PT):

Learn about its history here. And here's some other very good (but not as geeky cool):

Mr. H's Little Secret

Pssss.  Hey bud! I have a secret to share. Now that you know how to calculate the molar mass, here's a little cheat you should be permitted to use. It's called a Molar Mass Calculator and you will find several by following the links below. You type in the formula and it calculates the molar mass.

WebQC Chemical Portal (one of my favorites)

EndMemo (allows formula or name entry)

Environmental Chemistry (scroll to bottom)

Molecular Weight Calculator by Lenntech

or Google, e.g. molar mass Al2(SO4)3

FREE: A Chemistry Study Tip

Stretching out your studies over a lengthy period of time so that there are many "visits" of the material is far better than lengthier, less-frequent sessions of intense studies. So what's this have to do with Chemistry class? I'm going to tell you:

A little Chemistry each day helps. Your homework usually includes two WebAssigns - one is a "looking ahead" WebAssign in which you read about something that is coming up next. The other is a "looking behind" WebAssign in which you practice using something that we just learned in class. So why not do the "Looking behind" WebAssign on the evening of the Blue day - the day you were presented with the material. And then do the "Looking ahead" WebAssign on the evening of the Gold day - the evening just prior to when we cover the material the next morning. Hopefully that makes sense ... and it gives you a little Chemistry every day.  =SIGH=

    Online Homework


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Today in Class

>> Tuesday, November 21 <<

Focus Question(s):
  • Who CAN build the best Candemonium bot for moving the most cans around a U-shaped course?
  • Can the aging Mr. H do more tweets about this event than younger and more vibrant Mr. Sinde?

  • Today is the CANdemonium Contest in the TLC. No chemistry class today. Good luck Future Engineers.

  • WebAssign: Chapter 11.12 Reading Guide
  • WebAssign: Chapter 11:9-10 Electron Configurations

Next Time in Class

>> Tuesday, November 28 <<

We will rreview electron configurations and discuss periodic properties (pp. 17-20). We will spend a bulk of time working on Lab AMM2. The concept of a bond will be introduced and discussed using a PhET simulation and pp. 21-22 of the Packet.

Periodic Tables

Are you in need of a periodic table?  Try one of the following websites:

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