Assignment on Last Friday

We reviewed Lewis Dot Structures on last Friday. Here is the Assignment please copy and past to word document and print off. Remember you are responsible young adults and you are responsible for your education as well:

Yet More Lewis Structures

For those of you that enjoy such things, some more Lewis structures to draw:

1)         BSF

2)         HBr

3)         C₂H­₅OH (ethanol)

4)         N₂F₄

5)         SF₆

Understanding Free Radicals and Antioxidants

Respond to the following article: http://www.healthchecksystems.com/antioxid.htm
what am i looking for: Intro: what are free radicals and how are they formed, what is an antioxidant
secondly what are some effects of free radicals on the body. Furthermore what is the purpose of an antioxidant and how do they attact free radicals. Why is this article relevant to what we are studying at this moment: elements and compounds and why is your health important.
I will be looking for responses to this article to be detailed and specific. Use the article as a reference but fill free to look for other relevant sources of documentation. If you choose to use other documentation please site where the information comes from (If you plagerize and do not give credit you will receive a zero). I have my ways of checking. This is a Summative Grade which will count. Make it a good one.

Today's Assignment

Key Words over section 2.2 and Chp 2 and 3 Reading guide was given today. Be prepared for a quiz Monday.
                                                                    Key Word Notes

1	2
3	4
5	6
Summary:

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Next Assignment:


Name __________________________________ Period _________
Ms. Foglia Date ______________________
1 of 3
2005-2006
AP: CHAPTER 2 & 3
CHEMICAL CONTEXT OF LIFE & WATER
1. What are the most common elements in the human?
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2. Helium has an atomic number of 2 and atomic mass of 4. Explain.
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3. Define isotope and give some examples.
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4. How are isotopes used in biology?
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5. What happens when electrons change levels?
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Name __________________________________ Period _________
Ms. Foglia Date ______________________
2 of 3
2005-2006
6. What is the significance of valence numbers?
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7. Why do atoms form covalent vs. ionic bonds?
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8. How do non-polar covalent bonds differ from polar covalent bonds?
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9. What is a hydrogen bond? How does it form and how is it different from a covalent bond?
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10. Sketch a few molecules of water, indicate their polarity, and where H bonds form.
Name __________________________________ Period _________
Ms. Foglia Date ______________________
3 of 3
2005-2006
11. Why is H bonding so important to water’s properties?
__________________________________________________________________________
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12. List the “special” properties of water and give an example of why the property may be
important to living things.
a. ________________________________________________________________________
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b. ________________________________________________________________________
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c. ________________________________________________________________________
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d. ________________________________________________________________________
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8/16/2011 Today's Assignment:: http://www.cbsnews.com/stories/2011/04/13/national/main20053542.shtml
Write an reaction paper to this article. The response should consist of the following: The purpose or main idea of paper, how could this be avoided, what was the author trying to say, why is safety in lab important, and finally an conclusion