9.30.10

Anouncements:

• If Mr. Paek is not in class he has asked for us to be nice to the sub
• Tomorrow we will be in the computer lab or we may do a fireworks lab
• There will be a quiz sometime next week

Homework:

• Page 118 #14
• Read pages 106-109

In class:

• Got 6 pages to tape into notebook (to be taped as shown)

- 2 Atomic Model pages

- 2 Atomic Structure pages

- 2 Rutherford Simulation lab pages

• Completed Rutherford Simulation lab with a partner

- Put black carbon paper upside down on top of a white sheet of paper with 6 circles with a small square in the middle of each one

- Take small yellow ball and bounce it on the carbon paper around 100 times

- Answer questions using calculator

• As a class we answered questions 1-8

- Do not use ruler - only a calculator - for these questions

• Talked about what the lab represented relative to Rutherford's experiment with the foil

- White paper: gold foil

- Circles: atom

- Marble: (+) random particles

- Squares: nucleus

• Finished questions 1-4 on back page of lab in class

Exam: 10/8

Lab Exam: 10/11

The next scriber will be Andrea.

9.21.10

Homework Read pgs. 106-109 and complete pg. 106 #14

Today in Class

Today in class, we worked on and finished up the Atomic Scientists worksheet. We will be able to use this on the upcoming quiz, so it is important to take good notes on scientists and their contributions to the development of the atomic theory.

We were told by Mr. Paek that are goggles needed to be in Zipblock bags incase of spread of pink eye or infection. If anyone has not done so, make sure to do it tomorrow in class.

Next, we took notes on a powerpoint that was all about the four atomic scientists. The first scientist was Dalton, who in the early 1800s contributed the solid sphere model. He concluded that each element is made of atoms, atoms of one element are identical, compounds are made from different elements in whole number ratios, and that chemical reactions involve the rearrangement of atoms. The next scientist was J.J Thomson who concluded in 1897 that negative atoms must have a negative charge, and negative is negative, with overall neutrality, then must also have a positive change. He found this out by holding a magnet to sides of a tube and noticed a bend in the light. The positive side attracted the beam and the negative side repelled the beam. Another scientist was Ernest Rutherford, who in 1911 shot an alpha particle (positive charge)through gold foil. Most all went through some had deflected. He found all atoms have a tiny positive center called the Nucleus. The last scientist was Niel Bohr who in 1914 found that electrons "orbit" around. Electrons move around the nucleus in a cloud.

Pictured below are each scientist's Atomic Model

Bottom left to right:Bohr's atom, Current orbit atom

Top left to right: Dalton's atom, Thomson's atom, Rutherford's atom

Upcoming test-October 8th, lab test-October 11th

NEXT SCRIBER ..MAHAK!

9.28.10

Homework:
Read pages 101-106 in the Chemistry Text Book. There is no question today.

Class Today:
The lab today was called the "Black Box Lab." You went around the lab stations trying to find out the blockade in the black circle container. It was filled with a bead and you had to figure out the blockade without opening the box. After you felt confident in your answer you had to write the numbger of the black box down and then draw what you thought the blockade was. It was extremely confusing and difficult, often leading to extremely odd answeres from some of the class members.

This however was an extremely amazing metaphor for scientists Dalton, Rutherford, Bohr and Thomson whom all tried to decide what the shape of an atom was. They didn't have any microscopes that could see anything that tiny. Hence, the "Black Box Lab."

Reminder:
There is going to be a quiz on all four of these scientists soon. Do the worksheet assigned today that you can use on the quiz. Take notes from the four sheets that Mr. Paek gave us and you'll be good to go.

Also, the test is on Oct. 8th and the Lab test is on Oct. 11th.

Plus, if you want to retake your Lab Test, then tell Mr. Paek what day and period you're coming in.

The next scriber will be Kaylee.

9.27.2010

UPCOMING:
We will be having a Conversions Quiz either sometime this week or next week.

HOMEWORK:
no homework was assigned today.

BEGINNING OF CLASS:
Our lab notebooks were handed back but Mr. Paek did not get a chance to grade them. There were 4 sheets at the front that needed to be picked up.

Those sheets included 2 pages of the Unit 2 Schedule and the other 2 included the newest lab we will be doing this week called The Black Box Lab. (Also make sure to leave an open page between the Unit 2 Schedule and the New Lab.)

DISCUSSION:
Mr. Paek then mentions our Unit 1 Lab Tests and how the average of all the periods was VERY low. But on the bright side our Unit 1 Tests had very high marks. For our Lab Tests, if you decide to, you may retake them individually WITH the full 50 minutes.

The Lab Test has been improved where Mr. Paek added specific questions to guide you if you're completely lost on how to do this lab. You may retake them during lunch or after school by visiting Mr. Paek, NOT the TLC or testcenter.
Overall, the Unit 1 Tests turned out to be very good for most classes. Near the end of class Mr. Paek answered questions that we may have had relating to the Unit Tests.

END OF CLASS:
Our grade reports were handed back at the end of class today. Mr. Paek decided that he would not include the grades titled 'Texting', and also 'OnMyMind'.


the next scribe will be...RAINA!!

9/21/2010 Blog

Upcoming Events:
-Wed: Lab Test
-Thurs: Test, study using class blog and in-class notes
-Fri: Chem Day (same thing as Bio day, apparently better)
Homework:
-Study for Lab Test, Tomorrow
-Study for Chapter Test, Thursday
-Post 2 comments on Blogger- Go to Period 2 Chem Blogs, go through the list of blogs. Select 2 of the blogs on list and comment on something about the post. Don't be too brief, suggest what can be done to make it better, or what they did a good job on.
- Complete the 4 Chem Review pages
- Complete Chapter 1-2 Review sheet
- Mr. Paek collecting journals, Thursday. Make sure no falling papers
Overview of Today:
Today in class we talked about the information listed above. Then with the remainder of class we completed the 4 pages of "Chemistry Basics Review." Some people able to complete in class, if not completed in class, then rest that was not completed is for homework. Here are the pictures of the in-class work/homework if not completed. These pages have my answers to the "Chemistry Basics Review" pages and there is no guarantee for correct answers.

Next Blogger: Rachel Mitchell (voted by class)

9.20.2010

REMINDER:

1. Go study off the blog
2. Mr. Paek is collecting the study guides Thursday
3. The lab test is Wednesday and the real test is on Thursday
4. web assigns are due tomorrow
5. need two comments on someones scribe post

Today in class we took a quiz, if you did not take it then go to the test center it should be in there.

The next scriber will be.... John.

The Scribe List

This is The Scribe List. Every possible scribe in our class is listed here. This list will be updated every day. If you see someone's name crossed off on this list then you CANNOT choose them as the scribe for the next class.

This post can be quickly accessed from the [Links] list over there on the right hand sidebar. Check here before you choose a scribe for tomorrow's class when it is your turn to do so.

IMPORTANT: Make sure you label all your Scribeposts properly (Your display name, unit title, scribepost, and p2chem2010) or they will not be counted.

Jimmy          John A.   Andrea          Max       Micaela    Kimmy          Frankie          John H.            Ose            Agatha          Zak          BigMoneyBen          Mahak          Kevin          Paul          Rachel             Elizabeth     Raina           Monica          Kaylee          Yassine          Jill          Vit          Michael          Brandon