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Chapter 2 Blog:  The Chemical Basis of Life I (Nicole)

Page history last edited by Nicole Lee 13 years, 5 months ago

In the first section of this page, you will write a daily summary of that day's class.  For example in  your chapter 2 blog, your first entry should be titled 9/3/10.  You should then write a one or two paragraph summary of that day's lecture, outlining the major points.  In the second section, you are required to add two items (link to a website, video, animation, student-created slide show, student-created PowerPoint presentation) and one journal article pertaining to a topic in this chapter.  A one-paragraph summary must accompany each item describing the main idea and how it applies to the lecture topic.  Please see the PBWorks help guide for assistance embedding video and other items directly in the page.  I will also produce a how-to video on using tables to wrap text around items and other useful tips.  Please see the syllabus for organization and grading details.


A.  Daily Blog


Today's lecture, on September 3rd, 2010 (Friday), went over previously learned material from Chapter 2 Section one.  Our class went over many topics including:

  • how we find the amount of electrons in an atom
  • definitions of various terms 
  • what moles are and how to determine them
  • what type of measurements we should be using (Daltons)

Todays lecture was extremely helpful to me, not only in the sense that it was a good review of the information we had focused on in our homework, but it also helped me review some topics I was a bit rusty on.  For example, before class had started I was completely clueless about moles and how to calculate them using the periodic table (I even guessed on the mole related question on the homework and luckily got it correct).  However, after Dr. Weber went over what moles exactly are and how to calculate them I now understand the topic.  Another topic we discussed in class was radioactive isotopes (when the nucleus decays, giving off particles and energy).  We discussed how cancer cells can be located using sugars given to the body and a PET scan.  The lecture also reviewed new terms such as trivalent (when there can be three covalent bonds formed), divalent (where there are two unpaired electrons), and monovalent (when there is one covalent bond).

     The class also discussed the three different types of bonds an atom can have which are:

  1. Covalent
  2. Hydrogen
  3. Ionic

During the lecture, the class also learned how to answer the Do Now's through a texting service on cell phones, which i found to be amusing. 



The other day in class on September 8th, the class reviewed over water and it's properties.  We also discussed hydrogen bonds.  Hydrogen bonds are extremely weak bonds that can be found mostly in water molecules.  They have an electronegative atom .  Electronegativety is basically the amount of attraction electrons have towards themselves, this can be determined by the atomic weight of the element.  I enjoyed the examples Dr. Weber gave because they were interesting and easy to learn from.  Since I am a visual learner it was extremely easy for me to understand what was going on during the class.  We also learned about surface tension which is a measure of the attraction between  the surface of the liquid and molecules.  Luckily I didn't find too many challenging things about that days lecture and even if I did, Dr. Weber's visual and verbal examples cleared up most of my confusion on the topics.





B.  Useful Materials


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This first video link from youtube describes how ionic bonds are formed.  The narrator's voice is clear, precise, and the lecture is extremely helpful.  Although this video is short, it is simple and straight to the point.


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This second link I find extremely interesting.  This video gives a slice of the court case behind the brain cancer and cell phone mystery





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This first video shows a set of demonstrations for showing surface tension of water.  The visual examples helped me extremely with understanding this topic.  I hope you enjoy this short video.


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This second video shows a quick demonstration on how hydrogen bonds are formed.  I enjoyed watching this video because the narrator has a clear and concise voice and I can visually see how hydrogen bonds are made, Enjoy!



Comments (3)

Derek Weber said

at 2:13 am on Sep 9, 2010

9/3: Updated. I like the second video. It makes one think.

Derek Weber said

at 2:06 am on Sep 11, 2010

9/8: Not updated.

Derek Weber said

at 4:24 am on Sep 16, 2010

9/15: No journal article.

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