Percent Composition

Today we’ll be using our Homework from last night (Molar Mass Worksheet) to determine the Percent Composition of different atoms in those molecules. It’s really easy see the example below to help you with today’s assignment. The Answer key can be found on the Docs page. Use this as a tool to check work, not to copy.

Molar Mass: CaCl2 %Composition: CaCl2
1 CaCl2 Molecule:
1 Ca  = 1 x 40.1 = 40.1
2 Cl
2 = 2 x 35.5 = 71.0
                            111.1g/mole
%Ca= (40.1/111.1) x 100 = 36.1%Ca
%Cl= (71.0/111.1) x 100 = 63.9%Cl

Molar Mass

No. Not that kind of molar. Moles refers to the amount of atoms in a substance… but we’ll save that for a later day. Today, we’ll be learning how to calculate the mass of a molecule based on the Atomic Weights of the Atoms within that molecule. There will be a Homework assignment associated with this activity that can be found on the documents page along with a complete periodic table.

BIG 44 QUIZ… and some other stuff that’s not as big.

Today’s the Big 44 Quiz. Make sure you can identify the symbols and/or spell the names of the 44 elements required. If you need a refresher on which 44 you need check the semester 1 Docs page.

After the quiz you’ll be receiving some info on Atoms, Molecules, and Compounds. This includes notes, some practice problems, and HOMEWORK! They can all be found on the same sheet so check out the Semester 1 Docs or Notes for the handout.

Ch-Ch-Ch-Changes…

Your To Do List:

  • Take the Pre Test (found using this link or the docs page)
  • Take the notes using voicethread (link found on notes page)
  • Take the Post Test
  • Create an illustration (Follow the directions below)
  • Study your flashcards

Today we’ll be learning about Physical and Chemical properties and changes. Today is an independent learning day because I will be out for part of the next two days as I am involved with a seminar here on campus. Therefore I’m putting the information in your hands with voicethread. The annotated notes (yes that means I’ll be talking) are available on the notes page. AND, due to popular demand, I’ve gone ahead and added the key questions to the PDF for you. I know, I know, I’m too kind. When you’re finished with the notes, I’d like you to follow these directions:

  1. Get a clean sheet of computer paper
  2. Fold the paper in half
  3. Write, in text big enough to read from 5 ft away, “Physical Change” on one side and “Chemical Change” on the other.
  4. Below the text, draw a picture of an example of that type of change that was NOT ILLUSTRATED IN THE NOTES.
  5. Below your picture, explain how you know this is the type of change that it is.
  6. Make it neat, clean, and colorful.
  7. Turn it in to the dropbox when you’re done.
  8. No Electronic posters this time.

Tomorrow you’ll be in the lab with Mr. Fogel or myself observing some of the changes discussed today. Tomorrow is also your BIG 44 QUIZ so study those flashcards!

Day of Service

Today the Cathedral family will be taking part in a day of service. Each county will be volunteering their time and efforts towards improving our community, aiding the less fortunate, and helping those in need. It’s important to remember to take time to give of ourselves, and today is a terrific opportunity to do just that. Although the work may be hard or tedious, it’s worth it. We have been given so many gifts, the least we can do is share them with the world.

Marshmallows are a Solid… right???

Marshmallows are a solid. But! they are also partially a gas, since their is air trapped inside the Marshmallow solid. That trapped air makes the marshmallow appear and feel “fluffy”. That being said, today you’ll be using mini-marshmallows to show me what you know about the 3 states of matter: Solid, Liquid, & Gas. Below is the directions on how to complete the activity and the template you need to fill in and turn in/email.

 

Marshmallow States of Matter

States Of Matter Template

If you need a refresher on the states of matter and how the atoms in each react with one another, see Chapter 2.1 in your iBook.

Mr. Kubuske will be available to answer questions as needed, but will be working on something very urgent from the U.S. Department of the Interior. More details to come later.

Periodic Table – An Introduction

Chances are, at some point in your academic career you’ve been introduced to the periodic table and the elements listed on it. Today, we’ll be diving a bit deeper into the periodic table than you have in the past. As a part of your notes, you’ll need to label and color a blank periodic table. You can do this on Notability or on a hard copy with colored pencils or markers. If you’re choosing the latter, make sure you bring these utensils to class today.

The PDF for the notes can be found on the “Semester 1 Notes” Page and includes a VT link to review the notes on your own.

In conjunction with the Periodic table you will be asked to memorize “The Big 44” which is a group of elements we will be using frequently over the course of the year. You will need to make Flashcards (real or on an app) for a completion grade and to begin studying. Flashcards due Wednesday, quiz next Tuesday.

The Big 44

Now that’s a Big 44

Today, we’ll be going over the test and giving students who missed the test a chance to make it up. At the conclusion of the period we’ll introduce “The Big 44”. These are the 44 chemical names and symbols from the periodic table you will need to memorize. You will be quizzed on the Big 44 in the very near future (date to be determined because of the Day of Service & Walk-a-thon). The handout for the Big 44 is available below.

The Big 44

Tomorrow we’ll be in the lab wrapping up the measurements unit with a quick and easy lab on density.

Study Study Study

Unit 1 Test Tomorrow!

Below (and on the Documents Page) is a link to the Study guide you received at the beginning of last week. Look over your review sheets (answers on the Documents page), go over notes, watch voicethreads, and above all get a good night’s sleep. Good Luck and Study Up!

Unit 1 Study Guide

Reminder: Don’t forget about the possible 5 bonus points for your “Student Becomes The Teacher” assignment.

 

Review Questions Answers

The review questions answers are available now on the Semester 1 Docs page.

Remember the purpose of me giving you the answers is not for you to simply copy them and say you are done reviewing. Instead, complete the review on your own, check your work, and be ready to ask any questions you may have on Tuesday.

I implore you to begin reviewing your notes, handouts, and voicethreads now. Don’t wait! The test is Wednesday!