Wednesday, December 15, 2010
Alright, so today in class we went over the double and single replacement labs that we did with Mr. Tucker Monday. If you missed it you should have the papers in your journal but if not, there are copies on the back counter of the classroom. Tonight our homework is to review the quiz that we took on Friday, and correct any mistakes that we might have made. Above I've posted pictures from the board and those are the answers from the chemical reactions lab that we went over in class today.For a review, single reactions replace a single uncombined element replaces another in a compound. Two reactants yield two products.
In a double replacement reaction, parts of two compounds switch places to form two new compounds.
doublereplaceimage" align="baseline" height="28" width="378">
Also, don't forget to balance!
By Corey L.
Thursday, December 9, 2010
By Simone K
Monday, November 22, 2010
We started chemistry class today by picking up Polarity Olympics: The Games sheets and getting Polarity of Molecules 2 (pg 26) stamped. Before starting the lab we learned that polar molecules are molecules that have both a positive and negative side like water. Also, intermolecular forces are when the attraction is weaker than the bonds that hold it together, but is strong enough to affect the properties of water. We then started the Polarity Olympics lab which had two parts, The Trials and The Games.
Trial 1- The Penny Pile-on: In this trial each liquid will try to create as large a pile on a penny as possible.
Trial 2- The Capillary Tube Climb: In this trial each liquid will try to climb as high as possible in a vertical glass tube.
Trial 3- The Marker Clean Up: In this trial each liquid will try to clean two types of marker from glass.
Part 1- Solubility: In this part we each liquid was added to water to see if they would mix.
Part 2- Volatility and Surface Tension: In this part each liquid was ranked in its ability to spread on a table and evaporate.
Thursday, November 18, 2010
Today we started class by picking up 4 pages. After we all settled down we started on the different types of bonds. There are three kinds of bonds; Polar covalent, non-polar covalent and ionic. A polar bond is when one electron has a stronger electronegativity than the other in the bond and holds the electron closer to it's nucleus. Non-polar covalent bonding is when the electron being shared is evenly distributed between the two atoms. An ionic bond is when the pull from one atom is so strong that it rips the electron from an other atom. To find out what kind of bond the molecule has you take the electronegativity of the two atoms and subtract the bigger one from the smaller one. If the difference is less than or equal to 0.4 the bond is non-polar covalent. If the difference is 1.7 or higher the bond is ionic. Anything inbetween those is polar covalent. After learning this we went through and did pages 22-25.
Homework: Page 26 and webassigns & chemthink if you have not finished them
Tuesday, November 16, 2010
- finish Molecular Geometry packet
- ^remember to answer the questions on the 2nd page!
- ENJOY THE LATE ARRIVAL
Tuesday, November 9, 2010
Made with metals and nonmetals
Positive and negative charges
Shares electrons to be noble
Made of ONLY nonmetals
Monday, November 8, 2010
Wednesday, November 3, 2010
- Write the name of the cation(positive metal ion)
- Write the name of the antion (negative non-metal ion)
*If a polyatomic ion is formed, look up the name. (ex: NaNO3= Sodium Nitrate)
*If transition metals are involved, determine the amount of electrons lost, and use roman numerals to indicate the charge in the name (ex:FeCl2= Iron (II) Chloride)
We then proceeded to finish the third column of the table on pages 7 and 8, and then we worked on pages 11, 12, 13, and 14 in our composition notebooks as a class. As we did not get to finish page 14, it was assigned as homework, along with our Webassigns and the Chemthink. As a reminder, we have a Quest on this unit on Thursday.
Monday, November 1, 2010
We went over how to make a formula based from a pair of Ions.
Ex. K+ and O2-
There are three ways to do this, Common Sense, Common Denominator and Criss-Cross.
Essentially, K+ and O2- will become K2O
REMINDER. PROTONS ALWAYS STAY THE SAME. THEY NEVER CHANGE.
We are always trying to pair up the ions so that they will be neutral.
If there are a group of ions and you need to choose which should go together, choose the two that will have opposite charges and will "cancel" each other out.
Ex. Na+ S2-, I-, Zn2+
Na+ and I- should go together because one ion has a +1 charge while the other has -1 charge. Their opposite charges will cancel each other out (which is our goal).
After we went over the homework/extra credit, we (as a class) did pages 6 and 7 together.
6 was also about forming ionic compounds, but 7 was about Polyatomic Ions.
- Ions made up of many atoms
- ex: NO3 -1
- There are many negative Polyatomic Ions bu only one positive Polyatomic Ion.
- NH4 +1
Polyatomic Ions are always written in a specific order. The positive part is written first and then the negative part is after.
Cation: Positive Ion. You can remember this by the t in cation. The t looks like a + for positive.
Anion: Negative Ion. You can remember this by the n in anion. N stands for negative.
Also, the new periodic tables that we metioned before have names of some polyatomic ions which is the updated part.
The homework was the rest of page 7 and page 8. For the homework, we haven't learned the names part yet, so that part doesn't need to be done. As always webassign is homework.
Have a good weekend and Happy Halloween!!
Wednesday, October 20, 2010
After the potions and magic display we went over the assignment that was due that day. Our professor went over the periodic table work sheet pages two and three. These pages can be found in the town market know as Moodle. The main points in the pages were that families of mystic elements are more closely related then periods, and that the electron configuration is what determines the group’s reactivity. After we finished going through that sheet we began our journey through the magical world of ionization energy. In short it is the amount of energy needed to remove one electron form one atom however the amount of energy needed is not constant. For example it takes very little energy to take an electron form an Alkali metal where as it takes a lot of energy to take an electron from a Nobel gas. If you need to know more about ionization energy travel through the wormhole and check out these websites
After we finished the sheet on ionization energy it was time to leave the mystic land of test tubes and Bunsen burners
The last announcement is that mole day will be celebrated in the east gym on Oct 22 at 6:02 am, if you go you will receive 6.02 points of extra credit and bring cans for the caned food drive
That is all the information this electronic message devise has to offer now go on your way and enjoy the wonderful world of chemistry
Tuesday, October 19, 2010
The day started off not in our usual setting, but rather in the math lab. We all took our seats and grabbed two sheets that were the Periodicity Lab. We then completed the second half of the notes about Periodic Trends. We learned that the atomic radius increases as you move down through the elements in each group. Also the atomic size decreases from left to right across a period. Another thing new was sheilding electrons (blockers). They are the electrons between necleus and outer electrons. The notes can be found on moodle. After we finished that we followed the lab and created two different graphs. One was compare Atomic number vs. Atomis Radius and the other was comparing Atomic number vs. Ionization Energy. Both were supposed to finished and printed and ready to bring them tomorrow for class. The homework was to do pages 1-3 and work on webassigns, and thanks to Kiva I had a little extra and do this because she was mad my rock paper scissor skills were better. It was another great day of chemistry.
Before I depart from the scribe world, I would like to take a minute to send my thanks and recognition to Chris J. I was extremely baffled when I logged into moodle today. I had no idea what I was doing! So I gave Mr. J a phone call and he walked me through the process, step by step. What a guy!
Monday, October 18, 2010
- good conductors of electricity
- crush (brittle)
- bad conductors of electricity
- have properties of both metals and nonmetals
- Elements F and G reacted with HCl, while the rest did not.
- Elements A, D, F, and G reacted with CuCl2, while the rest did not.
- Li- floats, gives off Hydrogen gas, fizzes in water
- Na- floats, gives off Hydrogen gas, fizzing is much more vigorous
- K- gives off heat so hot that it lights the Hydrogen gas on fire creating a flame (same reaction as above except more vigorous)
- Rb- same reaction, except more vigorous than K, Hydrogen caught on fire, more intense
- Cs- most intense, "light show", breaks glass container that it was being tested in
- Mg- silver, shiny, thin strip
- Al- silver, shiny, round pebble-like shape
- WebAssigns (you're favorite)
- finish Metal, Nonmetal, Metalloid pages
Wednesday, October 6, 2010
- Orbitals are expressed by using a box
- Each orbital can hold 2 electrons
- S orbitals have a max of 2 electrons # of orbital box(es): 1
- P orbitals have a max of 6 electrons #of orbital box(es): 3
- D orbitals have a max of 10 electrons # of orbitals box(es):5
- F orbitals have a max of 14 electrons #of orbitals box(es): 7
Tuesday, October 5, 2010
-He is the thing we are finding the electron configuration for.
-1 is the level
-S is the type of orbital
-The superscript 2 is the number of electrons.
To make things easier, we took our own individual periodic table and labeled the different types of levels and orbitals. This helps us to write electron configuration. You read it from left to write. Also, we learned that:
s orbitals can hold a maximum of 2 electrons,
p orbitals can hold a maximum of 6 electrons,
d orbitals can hold up to 10 electrons,
and f orbitals can hold a maximum of 14 electrons.
After learning about electron configuration, we practiced writing it. We worked on pg. 6 and 7. There are two ways of writing electron configuration. One is the long way like Ca=1s22s22p63s23p64s2. Writing all that can be very tedious so another way to write it is like this: Ca=[Ar] 4s2. This is the abbreviation. You put down the last noble gas before the element and then continue from there.
Homework for tonight is to read pg. 130-136 in the textbook, worksheet pg. 9, and to do web assign. Test is this Friday!
Monday, October 4, 2010
Thursday, September 30, 2010
- +1 charge
- Heavy mass
- Inside nucleus
- Determines identity of atom by the atomic number
- -1 charge
- Virtually 0 mass
- Outside of nucleus
- Responsible for reactivity
- Constantly in motion
- 0 charge
- Heavy mass
- Inside nucleus
- Holds together nucleus
Neutral atoms= Same number of electrons as protons
Ions- individual atoms or groups of atoms that have a charge
- Ions are formed when, at certain times, atoms gain or lose one or more electrons.
- (-) ions can only be formed by gaining electrons.
- (+) ions can only be formed by losing electrons.
- Protons are never gained or lost when ions are being formed.
Tuesday, September 28, 2010
In the black box lab, Mrs. M had set up 12 black obsertainers that each had it's own unique design on the inside. Each obsertainer had a metal ball bearing in it and you had to figure out what each obsertainer looked like on the inside by the moving it around and listening to how the ball bearing moved inside of it. After you had finished recording you results, we were told to start a work sheet we were giving about the scientists who discovered the atom and it's many purposes. You were supposed to have at least finished the section about Dalton by the end of the period.
The only homework for the night is the webassign which will be due at the end of the unit.
Monday, September 27, 2010
After the class got settled Mrs. M handed back tests. The class average was around 83%, good job everybody! We went over the tests and handed them back to Mrs. M. You can come in and see them before finals if you would like. Other than that, they're Mrs. M's to keep. We were also given grade sheets today. All grades besides the lab test were on there.
Our lab tests didn't turn out quite so well. In fact, we re-did the write up today in class. Nobody got a grade on the original sheet we handed in. Instead, we filled out a new packet using the calculations from our original lab. If you didn't finish in class today you should have put a star on your paper and you will be given about 10 minutes tomorrow to do it in class. Hopefully things go better this time!
If you missed the Chem day on Friday Mrs. M will assign you problems to do from the book to make up for it. If you would rather look up the episode (helium footballs and catching a bullet in your teeth) online and take notes, that will also be accepted.
Wednesday, September 22, 2010
When I first walked into the classroom today, Mrs. Mandarino began in the usual manner of stamping homework, and she began with the review in the journal, of course. Mrs. Mandarino demonstrated us the correct ways to draw molecular and pure compounds, even in the cases of before and after a chemical change. We went over physical and chemical changes, and we even reviewed a handy helping of density equations. The unit conversions took a while to get through, but it all managed to come together when we did sig figs and scientific notation. We even got through precise measurement. Overall, today was not the most interesting of days by far, but it really managed to help a lot of people who were struggling with certain types of problems. A simple review day, to say the least. But at the very last moments of class, the teacher described the contents of the written lab we had to do on Thursday. Apparently, we were each assigned a partner for a glass vial lab. We had to fill a glass vial with sufficient amounts of gravel in order to sink to the bottom slowly, but not float. And there is no homework, aside from studying for the big lab test tomorrow. Durrr!
Monday, September 20, 2010
Thursday, September 16, 2010
- characteristics you can observe (descriptive)
- use your senses
- the way a substance will behave
- state changes --->solid--->liquid--->gas
- color change
- odor change
- production of heat
- production of gas
- sound and light show
- bonds break, atoms rearrange, new bonds form
Wednesday, September 15, 2010
Atom: Most basic unit of matter
Molecule: A group fo atoms held by a chemical bond
Element: A substance made out of one type of atom
Compound: Two different types of atoms present in the same molecule
Solid: Atoms vibrate but are not free moving
Liquid:Atoms are free floating and are close together.
Gas: Very fast free flating atoms
(These are just general definitions, to learn more go to the tutorial on Chemthink)
Today we all started out the class by checking last nights homework which was page 12. Since most of the class was still a bit shaky on conversions we went over the rest of page 11 (which was homework due yesterday). Mrs. Mandarino had a few kids go up to the computer and solve a few after she went over one. Since the classes were shortened today, we did not have as much time to do much else. We did start page 13 in our journals. We defined what atoms, molecules, elements and compounds were.
The homework for tonight is Check page 12 on moodle and work on webassigns.
Monday, September 13, 2010
- We had to find the different units that could allow us to convert tons to kilograms.
- We knew by looking at the conversion chart that there are 2000 lb in every ton.
- From there we saw that there are 453.6 g in every pound.
- This allowed us to have this equation
- 0.00534 ton x 2000 lb x 1 kg
- 1 ton 2.205 lb
- By looking at the equation we were able to see that the tons and pounds canceled out. This left us with only the kilogram as our single unit.
tonx 2000 lbx 1 kg
- Now all that was left to do was to multiply all the numerators and divide that by the product of the denominators.
- (0.00534 x 2000 x 1) = 4.8435374
- (1 x 2.205)
- Finally we knew that we had to change the final answer into 3 sig figs, because the initial amount of
0. 00534 had 3 sig figs. The final answer was 4.84 kg
Sunday, September 12, 2010
Today we started class by reading the scibe post. We found that we needed to review density a bit more. Therefore Mrs. M went over the homework really thoroughly. We found that we have to read the questions carefully to determine what the question is and what is the given information. Sometimes it helps if we list out our information.
Mrs. M showed us how the density of a mehane bubble is less dense than air. Before it reached the ceiling, Matt lit it on fire like the the college students in the below picture:
** NOTICE THAT THEY ARE NOT USING PROPER LAB SAFETY. Can you see what they are doing wrong?
Next, we began conversion factors. We saw that when we are changing or converting one unit into another unit, we must be careful to place the values in the appropriate spots so that we can cancel out the unit that is not wanted. For example, when converting 127.5 inches into meters, notice the placement of the units.
We will work on conversion factors on Monday as well.
Study for quiz on Metrics, Sig Figs, and Density
Friday, September 10, 2010
- Today we turned in our formal labs for the Alka Seltzer part 3.
- We then continued our discussion on scientific notation and density. On our homework, we saw that object 1 data was for a regular shaped object so we used length x width x height to determine the volume. Object 2 was a irregular shaped object so the data reflected a volume determined by water displacement.
- We then completed the first two sections of the density lab. Below are the objects we were given:
- Remembering what we learned in the homework, we used L x W x H to determine the volume of the regular shaped object.
- We will finish the last part of the lab on Friday.
Continue working on webassigns. Not many people have started - Do not wait until the last minute!
Finish worksheet p. 8
Wednesday, September 8, 2010
Today in chemistry, we again braved the confusing world of significant figures. We learned new rules for adding them together, multiplying them, subtracting them, and how could we forget dividing them? Then, after that we learned how to put numbers into scientific notation form. Many others, including myself, were very confused with this process! Mrs. M reminded us:
Just remember when zeros are not significant:
Ms. Mandarino reminded us before we left that the homework was number 2 on pages 5 and 6 and that we will being doing number 1 on page 6 tomorrow in class. She also reminded us that our formal lab write ups are due tomorrow and if you are not turning it in through google doc, you need to bring it in printed out. The ol’ fashion way!
Tuesday, September 7, 2010
Today in class we received pages 7,8 & 9 to add into our composition books and discussed the homework, pages 1 and 2 in our notebooks
The next thing we did in is learn the sig fig rules
ex. zeros between non-zero digits are aways significant 3.108 is 4 sig figs
we then learned rouding sig figs
ex. rounding to 4 sig figs - 12,345,670 would be 1235000
Friday, September 3, 2010
Today in class we covered a decent amount.
Mrs. Mandarino started class by explaining Moodle to enhance our knowledge regarding it. Please use this as our home base. This page contains all of the necessary information on notes, assignments, labs, calendars, and homework. It also provides us with the necessary links for webassign, chemthink, etc.
After, we took notes about the Metric System (SI), and learned how it exactly functions.
- We learned that this is a base 10 metric system used all over the world.
- We can add prefixes to the base units. See notes for proper prefixes.
- We must measure correctly to get proper data. ie: always measure at the miniscus and always measure one value past the last marked value - make sure to notice the smallest markings on the lab equipment. This will improve accuracy and precision (significant digits).
Later on the projector we looked at graduated cylinders with liquid inside, and practiced measuring it, we also looked over the measurement lab which should now be finished.
In the final minutes of class we looked at how to sign in to WebAssign and ChemThink
Compliments of period 8
Today, we started off class by grabbing six half sheets of paper to tape into our composition notebooks. Then, as we all sat in our seats, Mrs. M read Grace's scribe and assigned the homework which was to finish the lab techniques and safety equipment half sheets.
After we did the beginning of class routine Mrs. Mandarino had us watch three different movies about lab safety, what to wear in the lab, what to do in case of an accident and proper behavior while conducting a lab. During the lab safety section, Mrs. Mandarino paused the movie occasionally to highlight the most important rules. While in the other sections, Mrs. M. paused the movie to share expierences she has had in the past being a student and a teacher.
Next, we went over the lab techniques sheet and Mrs. M showed us what each piece of lab equipment looked like that was on the sheet and what the purpose of each one was. These pieces of equipment were a thermometer, beaker, Bunsen burner, funnel, test tube, Erlenmeyer flask, ring stand and a graduated cylinder.
Finally, the last sheet we went over was the safety equipment. This sheet had a map of the classroom which included the lab tables and Mrs. M's desk. We had to label the fire extinguisher, main gas shut off, eye wash, fume hood, fire blanket, exits and the shower. As we filled the map out, Mrs. Mandarino showed where each one was in the classroom and what we were supposed to do with each one.
Monday, August 30, 2010
Today in chemistry, we took some notes on how to create valid experiments. (These notes can be found on moodle.) We learned the difference between indepenent, dependant, and controlled variables. We also began the alka-seltzer experiment. During part 2 of the experiment, we learned that the build up of pressure within the film canisters forced the top to pop off! We began to change the amount of water within the canister to see if that had an effect on the time it took for the lid to pop off.
|Alka Seltzer Rocket After Reaction|
Friday, August 27, 2010
Today in Chemistry we came in and got settled, then we turned in our homework, and taped a few pages into our composition notebooks. Next, Mrs. M talked more about digital ethics. After that, we took a 25 question pretest, and to end the class period Mrs. M started introducing the Alka-Seltzer lab, and assigned us our homework. It was a really easy and relaxed Chemistry class.
Thursday, August 26, 2010
Today we walked into class and once we were settled in we got our assigned seats. Mrs Mandarino introduced herself and handed out papers. These papers included the materials we need to bring to class and grading scale. We learned how to use moodle on the net books. Mrs. Mandarino also talked about writing sketches. 'twas a lovely day.
Tuesday, August 24, 2010
Daniel B. Emily F Anastasios K. Michael P
Mike B. Meghan G. Simone K. Kaitlin S.
Greer J. Corey L.
Christian F. Se Hee K.
Friday, August 6, 2010
Welcome! You have sucessfully found our class blog. This is a place to see what happens in class everyday. It can help you review; ask a question that you didn't get a chance to ask in class; or find out what you missed if you have been absent. Please feel free to share this blog with your parents.
Before you begin blogging, please view the video to learn how to become an author on our blog. Please be sure to choose an appropriate screen name. This name should allow me to identify you while also maintaining your privacy. Please do not use your last name! Before you dive into blogging, please read this entire post.
How to become an author
What is a scribe post?
When we think of blogging, many times we think of posting ideas on facebook or twitter. While we use blogging for social networking, it can also be used as a valuable educational tool. Every day one student will be responsible for creating a post describing what went on in class that day. These posts are called scribe posts and will be the bulk of our blog. The person who makes the scribe post for the day will assign the scribe for the next post the following day in class. Once you complete your post, please make sure to cross your name off the scribe list on the next post.
Labels are also known as tags. They are important in keeping our blog organized. They will also help me keep track of your contributions for your grade. You must include the following 3 labels:
1. Your name = please use your first name and last initial
2. The unit we are studying = see moodle for appropriate unit names
3. The type of post it is = Most will be "scribe" posts. Later we will introduce the "on my mind" post.
Remember, blogging is a very public arena. Anything you post on the internet, will always be on the internet. Even if you delete a post, it may remove it from the blog, but copies of the post may exist all over the internet. Therefore, we must be very careful to respect your privacy and the privacy of other classmates by:
1. Using only first names.
2. Never posting any pictures of ourselves.
3. Never including information about activities in our own lives.
4. Always using good judgement.
Blogging rules to live by!
- Blogspaces are classroom spaces. Speech and actions that are inappropriate for class are also inappropriate for our blog. Please remember to always be respectful.
- NEVER give out or record personal information on our blog. Do not share anything that you do not want the world to know.
- Remember, our blog is a public space. If you put it on the internet, chances are that it will remain on the internet for a very long time. These posts may effect your future. It might be possible for a future employer to discover things about you through thoughts you posted in your younger years. Be sure to post thoughts that you are proud of.
- Never add a link to your post that you have not thoroughly read. Make sure you want to be associated with the link before you add it to your post.