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.
The End is Near - And Nearer Than Once Believed
be too alarmed, but just so you know ... the end of the unit is very
near. The Unit 3 Stoichiometry Test will be taken on Tuesday, November
13. More information will be provided about the test later this week.
FYI: The unit will end on Wednesday, November 7 with possibly a few
loose ends to clean up on Friday. We will use most of the day
on Friday, November 9 to start Unit 4. The majority of the block on
Tuesday, November 13 will be spent taking the Unit 3 Test.
The Unit 3 Test includes 15 multiple choice questions, five multi-part
conversion/stoichiometry problems, and a multi-part Lab question. The
Lab question provides data from a lab similar to one that we did. The
data must be analyzed to determine the answer to the Lab question
; rules of significant digits must be followed.
The problems include some short grams <==> moles <==> atoms
conversions, some basic stoichiometry, a multi-factor conversion factor
problem, a couple of limiting reactant problems, an excess reactant
problem, and a % yeid problem. Prepared students will do very well and
see not surprises.
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
Hey get this! There's a WebAssign due
on the Test Day; its called Stoichiometry 5. I will make it an optional
WebAssign. If you don't do it, then it will go into the Gradebook as
excused. If you do it, then you will earn yourself a 4th WebAssign
The key for last Thursday's Quiz is available online. View Key
The quiz was a 30-point quiz. Point values are as follows: Q#1: 3 pts;
Q#2: 4 pts; Q#3: 4 pts; Q#4: 8 pts; Q#5: 3 pts; and
Q#6: 8 pts. Partial credit was given based upon the quality of work and
the level of understanding that it reveals. Good quality work is visible
, follow-able, and reveals an understanding of the practices taught in class. All judgements are final.
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.
Crash of Avogadro Airlines Flight 1023
Today we will start a short project titled Crash of Avodadro Airlines Flight 1023
To complete the project, you will need to access a shared Google Sheet and a
Google doc. Each has been placed in Google Classroom. You will open the
shared Google Sheet and manipulate it in order to complete the project.
Everything you need is either in Google Classroom or on pp. 19-20 of
your packet. Plan on using classtime for the completion of most of the
project. If you complete the project early outisde of class, you will
be forced to tutor students during the project.
Google Classroom ... Revisited
You should all have Google Classroom
accounts. You will need it to do the Crash of Avogadro Airlines Floight
1023 Project. Here are the Course Codes:
Block 1 Chemistry: 3rjmzu
Block 2 Chemistry: h95yke
Don't fall behind in chemistry at this point. The snowball effect will occur.
That is, you will feel like you're running down a snowy hill with a
rolling snowball rolling behind you. The further you go, the bigger the
snowball becomes until finally ... .
Hopefully, you get my drift.
Come in and get some help when you need it. Use the referenced web
pages and YouTube videso as well. (I highly recommend Tyler DeWitt's
Get to Know the Table
It's perhaps the greatest and most
popular infographic of all time! It's called the Periodic Table and it
falls within the realm of science. No - you don't need to "memorize the
periodic table." But you do need to become familiar with it. And
besides, what educated individual wouldn't want to know a bit about the
greatest infographic of all time!
There's numerous Periodic Tables across the web. Here's one of your
teacher's favorites - the Dynamic Periodic Table. Interact with it and
start of learn. Curious minds need to know ... the periodic table.
The Dynamic Periodic Table
More About WebAssigns
There will be two types of WebAssigns:
Reading Guides and Practice Assignments. They are set up quite
differently. Reading Guides will allow one attempt per question; you
will not reeceive feedback until after the due date. They will be
discussed after completion. They are graded very leniently; that is,
your grade on the assignment will be much better than your grade on the
WebAssign; think of them as being abnormally curved. NEVER worry about
what your grade is on a Reading Guide; leave that worry up to me.
Practice Assignments are the second type of WebAssign. You are more
accustomed to this type from Physics. You receive immediate feedback.
You are allowed multiple attempts. And your grade on the WebAssign is
(for the most part) your grade on the assignment.
page changes nearly every day; re-load
or refresh to receive the most recent schedule.
|>> Friday, November 9 <<
- What is a quantum model of the atom and what was the experimental evidence that led to its acceptance?
- Pick up Packet
- Discuss Tuesday's Test
Urine Trouble; Something to Be Excited About
- Intro to Unit 4: Atomic and Molecular Structure
- Probing the Atom History: Thomson, Rutherford, Bohr, and More
- Wavelength-Frequency-Energy - Demos; p. 3, Q#1-3
- Discuss Wave-Particle Duality (TedED video); Image; Plank's Equation; line spectra; Packet, p. 3, Q#4-5
- Bohr's Quantum Model of the Atom: Video; Packet, p. 4; Confetti Demo
- Check Reading Guide - pp. 1-2
- Lab AMM1 - Elemental Fingerprints
- WebAssign: Stoichiometry 5 (OPTIONAL)
- Prepare for Unit 3 Test
- Maybe next year. Stop back then.
- Or go check out Tyler DeWitt You Tube Channel or Hank Green's Crash Course Chemistry.
Time in Class
|>> Tuesday, November 13 <<
will do a little Bohring math. We will discuss the good, the bad, and
the ugly of the Bohr model. We will watch a couple of short video
clips. We will take the Unit 3 Test.