Metal, Nonmetal, Metalloid Lab

Hey you guys, sorry I am putting this up a little late!

Today's class period was spent doing the metal, nonmetal, and metalloid lab. If you were absent on Friday when we got the lab you can get it here.

In this lab we tested 8 elements; aluminum (Al), carbon (C), Iron (Fe), Magnesium (Mg), silicon (Si), Sulfur (S), tin (Sn) and zinc (Zn) for 4 psychical properties and their chemical property.



For Each of these 8 elements we looked at their appearance and looked for luster(if they were shinny or dull). We also tested for their malleability. Which means when we hammered them, were they flat or did they break. And last we tested for their electrical conductivity.


What you see here is the malleability test being conducted.


This is the object we used to see (well actually hear) the electriacl conductivity. (If anyone has any cards with sound in them, you can brign them in to Mr. Lieberman)

After looking at the physical properties were tested their chemical properties by taking a little bit of each of the elements and putting them into 2 test tube. Then we add hydrochloric acid to one test tube and observed the changes and to the other test tube we add copper chloride and also observed the changes and made note of these in our data table.

Your homework for tonight is to work on the lab which is due on Wednesday, to do the webassign for tomorrow and to do the chemthink which is due next Monday.

That was all for today!
and the next scribe is.................. Rachel K. Good Luck!

Atoms and More!!!!!

Hey there, sorry that i am posting this so late, band practice went a bit overboard......




Lauren couldn't do the blog tonight so I'll be subbing in for her. Today in class we tried to get the Homecoming Genie to come out, unfortunately he did not come out. Mr. Lieberman claims that the Genie was crying because of our lack of spirit......so tomorrow EVERYONE needs to wear blue and gold, COME ON AND LETS SHOW OUR SPIRIT!!!!!!!!!!
For those of you who weren't here in class or listening here are the equations for the Oleic Acid Lab problems.......

For the first question you would take the volume you got for the single drop of methanol and the oleic acid drop (aka .005) and multiply them together to get the volume of Oleic Acid per drop of solution.


For the second question the Surface Area of a circle is Pi (3.14159) radius squared.....


For the fourth question you would cross multiply the height (found in question 3) over the width equals 18/3 so the problem would look something like this..... h/w=18/3 and then you would cross multiply to get your answer.


For the fifth question you would multiply the length by the width by the height to get the volume.

For the sixth question you would just multiply the density by the volume to get the mass.


And finally the seventh question, the theoretical amount is given to you now you just have to do the work...... Actual (what you got) minus the theoretical over the theoretical times 100.


The other two questions don't need equations. Also this lab is due TOMORROW!!!!!! Some other things that are due tomorrow: The Rutherford Simulation lab, and the Chem think-isotopes (click on the Atom then click on Isotopes, remember to read the tutorial before answering the questions!!!!!!) Here is some home work that is not due tomorrow but was assigned.....The Web Assigns (they are now posted on the web assign website), and the Atomic Structure work sheet. I couldn't figure out a way to put the link in the post so I'll just give you the instructions......1st sign on to the moodle website 2nd go to Chem Honors 173 metacourse then click on the Unit 2 worksheet link and look of the pdf. file of the Atomic Structure worksheet.



Also in class today we took notes on the Atomic Structure.....
http://www.slideshare.net/gbsliebs2002/atomic-structure (sorry the thing wouldn't let me upload the file....and yes I tried both the embed code and the url).....geeze the blog won't let me upload a lot of things......



Oh the next scribe will be........Nirali P.!!!!!!!!!!!! Good luck to you!!!

P.S WEAR BLUE AND GOLD!!!!!!!!!!!!!!!!!!!!!!!!!

Oleic Acid Lab/ Niels Bohr model

Today, Wednesday, the hump day of the week, we started an experiment called the Oleic Acid Lab. If you need the lab you can find it here. We also went over some notes on Niels Bohr and his atomic model. He concluded from his experiments and the experiments of other scientists of the time that the electrons orbits around the nucleus in set orbits. If you are interested in learning more on Niels Bohr click here. He was influential throughout the 40s and 50s with his work on the Manhattan Project. Now on to the lab. The Oleic Lab had to do with Determining the width, mass, and length of an oleic molecule. Here are some pictures of the experiment.

This is an example of a good circle that most people got with the oleic acid.

This is...well...not such a good example. It just looks like someone spit in it. :(

Mr. Lieberman also went over the Rutherford Experiment with us. He told us how to calculate the are of the circles:

circle area = (# of dots inside the circle divided by # of dots total) x total area of the paper

That will give you the area of all six circles together, so don't forget to divide that by six. Then the are of the squares inside the circle follows the same equation except its the # of dots inside the square divided by the total # of dots inside the circles. Mr. Lieberman also told us that everyone should have at least one dot inside the square. If you don't have one inside the square, add one.

Homework is the Rutherford Experiment and the Oleic Acid Lab which are both due Friday

Thank you everyone. This is Conor signing out. Next scribe is Lauren C.

The Rutherford Experiment

The first thing we did in class today was check to see if the homecoming genie would come out. Although the class was full of school spirit, the homecoming genie stayed in the lamp. After that we started to go over the notes. Here is a link to the notes: http://www.slideshare.net/gbsliebs2002/atomic-history-day-2-1

After we finished discussing the notes we started a basic simulation of the Rutherford experiment. We had a little ball and we bounced it on a sheet of photo-detector paper that was cover with foil. The little ball represnted an alpha particle, the photo-detector paper represnted where each alpha particle bounced and the foil represented the gold foil from the original Rutherford experiment. Every time the ball hit the paper it would leave a small black dot.

After the simulation we had to calculate the area of the paper (21.5cm.*28.0cm.) then we had to calculate the area of the circles and the area of the small squares inside the circles without measuring anything. Area of a circle formula: pr². Then we had to find the percent error based on the true area of each circle. The true area of each circle was 50.26

The homework is to finish the Rutherford simulation, finish the pre-lab for the oleic acid lab and 2 assignments on chemthink. the homework is due on friday.

The next scribe will be Connor H.

Just Another Exciting Day in 7th period Chem....

Today was just another exciting day of seventh period chem with D-Liebs. We kicked off class today with an ever so exciting discussion on the one and only...............HOMECOMING GENIE!!!!!!! Today being the first day of homecoming week at GBS, Mr.Lieberman told us the story of the homecoming genie. He showed us the bottle in which the homecoming genie is in. Liebs told us how the homecoming genie only comes out if the school is filled with homecoming spirit. Mr.Lieberman then opened the bottle and.................nothing happened. In a desperation move to get the genie out of the bottle, Chris and Artie proceeded to sing the fight song!.......FAIL. Artie didnt even know the words. The only one with spirit in the room today was Erika G. Nice job Erika! Tomorrow we are definitely getting the genie out of the bottle because like Mr.Lieberman said, homecoming is nothing without the homecoming genie. So, WEAR GREEN AND SILVER TOMORROW FOR SLYTHERIN (our class house for tomorrow)!

(look like this, we will for sure get the genie out)

After the talk on the homecoming genie, we got down to business. It was time for chemistry. First, we talked about alchemy. Alchemists were scientists hired by kings and queens to make immortality potions, turn random metals into gold, and other scientific things. Alchemists were the first people to record data like, data about elements, lab apparatus's, procedures, and experimental technique. After alchemists, we talked about Robert Boyle. Robert Boyle stated that a substance was an element unless it could be broken down into two or more simpler substances. Robert Boyle transitioned from some of the weird science of the alchemists, to some of the chemistry we use today. After Boyle, we talked about Dalton. Dalton was a religious school teacher/ principle at 13/ genius. Dalton said that atoms do indeed exist and they are indivisible and indestructible. Dalton provided the first atomic model backed by data/evidence. Later, this guy named Thompson disproved Daltons model by conducting this experiment...

This experiment showed that atoms do have negatively charged particles called electrons because electrons are the reason the beam was attracted to the positively charged magnet. He then proceeded to make an atomic model according to his findings. This model was called the "plum pudding" model. No, i dont know what he was thinking with the name.... So yeah that is where we left off today in 7th period chemistry with d-liebs.

Notes From Today

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Your homework for today is.....

1) DRESS GREEN and SILVER tomorrow!!!

2) Watch our 2-0 BEARS beat the cheese-heads of Greenbay on Monday Night Football today!!!! GO BEARS!!!!!

The next scribe will be......MATT BROWN