Night Before the Test

Here are a few more YouTube video I've been watching to prep for this exam. A little drier than the first few but they do a great job of covering the material.

DFTBA

Overview of Sig Figs

What I understand of Sig Figs is basically that they are all the numbers represented when a number is written in scientific notation. Trying to remember all the rules of whether a number is significant or not is a little too much to think about converting it to scientific notation is a lot easier.

As for math functions, sig figs get rather confusing, all I can say is remember that rounding is always to the least accurate number and that the least accurate number in adding (or subtracting) is the one with the least decimals while the least accurate number in multiplication (or division) is the one with the least sig figs. Other than that, remember states of matter, types of mixtures, and nomenclature. That should be it for the next quiz.

Also these link will help. The bottom two are a little elementary but they explain the topic quite nicely.

#CrashCourse

Unit Conversion & Significant Figures

What's Matter?

The Great Picnic Mix Up (Solutions and Mixtures)

DFTBA

Chem Club Awesomeness

For this very special day in the chemistry we did an "explosive" experiment and it was really cool...Sorry for the vertical video :)

DFTBA

Pre Test

We had our pre-test and I'm feeling decent for this next chapter. I couldn't remember how to add and subtract sig figs but I think I rembered how to figure out how sig figs were in a number... maybe. Other than that this will be an interesting chapter.

DFTBA

Selfie

Selfie of us doing the lab...not. :(

DFTBA

Summary over our Unit

First off -or last off, I guess- we took our unit test for radioactive decay and atomic structure. I think I did well but maybe not good enough. My grade in the class plummeted after the frontier chemistry project and since I have struggled to pull it back up. The unit wasn't to confusing as, at least for me, the math wasn't to difficult as I have encountered these problems in other classes. What got me on the test were a few specific questions. I know I got at least one polyatomic question wrong as I decided it was to my best interest to study the other parts of the unit. I guess this turned out to be a bit of a mistake. I really should have studied those a little more. Oh well. Anyways, before the test we did a lab over half life and archaeology. I rather enjoyed the lab as it was a great review over what we had just learned in class. Also, this was the first time we had used Excel in this class. For myself, this came as no difficulty since I had learned how to analyze data tables and graphs in Physics I last year. Overall I liked the lab even though to complete it, Mikayla, Evan, and I (as well as the rest of the class...obviously) had to cut out over 500 half inch square pieces of paper by hand.

All in all, I think this unit went well, I'm really hope that the Star Log Project will cancel out how poorly I did on the frontier chemistry project.

P.S. Linked below are some videos I found useful during this unit, I realize they are now useless for us who are taking Chemistry now but if this blog is around next year hopefully these links will be useful to the next year.


Nuclear Chemistry: Crash Course Chemistry #38

Nuclear Chemistry Part 2: Fusion and Fission - Crash Course Chemistry #39

http://hyperphysics.phy-astr.gsu.edu/hbase/nuclear/halfli.html

Nuclear Half Life: Intro and Explanation

Keep Calm, Study Chem, and DFTBA