Half Life - From Wikipedia -

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In general, the half-life of a nuclide depends solely on its nuclear properties; it is not affected by external factors such as temperature, pressure, chemical environment, or presence of a magnetic or electric field.[3][4][5] (For some nuclides which decay by the process of electron capture, such as beryllium-7, strontium-85, and zirconium-89, the decay rate may be slightly affected by local electron density, therefore these isotopes may not be as suitable for radiometric dating.) But in general, the half-life of any nuclide is essentially a constant. Therefore, in any material containing a radioactive nuclide, the proportion of the original nuclide to its decay product(s) changes in a predictable way as the original nuclide decays over time. This predictability allows the relative abundances of related nuclides to be used as a clock to measure the time from the incorporation of the original nuclide(s) into a material to the present.

IONS

Do Now# _____ Define Ion and then draw an ion of helium. Clearly label your protons, neutrons and electrons.

Do Now # ___

Define: Atomic number, mass number and isotope and then draw an isotope of Carbon. (Clearly label your protons, neutrons and electrons.)

Stephen Hawkings - Aliens - Into the Universe

Chapter 12 vocabulary

Atoms

Model

Theory

Nucleus

Electrons

Electron cloud

Protons,

atomoic mass unit (amu)

Nuetrons

Atomic number

Isotopes

Mass number

Atomic mass

Forces in atoms

·         Gravity

·         Electromagnetic force

·         Strong force

·         Weak force

Vocabulary for quiz on Monday

• element
• pure substance
• metal
• metaloid
• nonmetal
• compound
• mixture
• conductor
• thermal and electrical conductivity
• malleable
• ductile
• brittle
• law of definite proportions (pg 86)
• chemical properties
• physical properties
• chemical change
• physical change

this unit assumes a mastery of vocab from previous unit on physical characteristics: density, solubility, conductivity, etc.

List of Blogs

Dear Students,

I would like a link for each of your blogs.  Please comment with the web address of your blog.

Thanks.

Mr. Sneideman

Chemical Hazards

The human race is now polluted with thousands of industrial chemicals - with little or often no understanding of the consequences.  Many times chemicals are recalled after decades of use.  In fact, babies are born with as many as 300 industrial chemicals in their bodies when they enter the world.  Lets learn more as a class so we can be informed citizens and consumers.


Go to this web address and read and explore for 20 minutes.  Come to class with an idea of which category you would like to study.

http://watoxics.org/chemicals-of-concern 

Chemicals of concern specific to children's toys
http://www.healthystuff.org/departments/toys/chemicals.introduction.php



Washington Toxics Coalition - lots of good links.
http://watoxics.org/about

US GOVERNMENT WEBSITE ON WATER POLUTION

http://water.usgs.gov/

Links for Pesticides

http://www.pesticideinfo.org/Index.html

http://www.pesticideinfo.org/airpic/ap_step1.jsp

http://www.panna.org/science/myths

http://www.pesticideinfo.org/Docs/ref_help1.html

plastics 101 –

http://watoxics.org/healthy-living/healthy-families/safe-start-for-kids-1/plastics-101

Teflon and Gore-Tex
http://www.ewg.org/reports/pfcworld

Links to for chemicals and children's health.
http://www.ewg.org/childrenshealth
http://www.healthystuff.org/departments/toys/


Flame Retardants
 http://www.cleanproduction.org/Flame.About.php 

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Rubric - Chemical Blog Project

Name _______________________   Partner____________________         Blog Grading Sheet

Blog Design Criteria	Evidence	Pts	Comments
At least 2 pages
Apropriate titles
Have at least 3 entries on main page
Grammatically correct
Includes a link to the class wiki
Embed 2 videos appropriate to the topic
Insert pictures minimum 3
Include a survey question with a date till December 1st
Remove unnecessary gadgets  - (followers and about me)
You include links to websites that have useful information (minimum 3) and a Link to class blog
Special instructions from Mr. Sneideman
CONTENT	Evidence	Pts	Comments
Why you chose your particular chemical/group
What you learned each day of the project
What is your chemical group used for? Explain how it is applied, created and distributed.
How does your chemical group affect human growth and or development: (What are the effects on human health?)
Is it cancerous (carcinogen)? If so at what level?
How toxic is it?  What is its toxicity?
What steps consumers can take to protect themselves – explain how the steps help…
Where one can go to find info on the safety of chemicals/products with links.
Compound or Element?  How is it made?
Vocab: I want to see (10) science vocab words bolded and defined.  When you encounter words you do not understand, dig deeper!

Recent Do Now's

Is air a mixture or a compound?  Explain.
Under what process can compounds be seperated?  What is the end result?
How do we know if something is a metal?
How do we know if something is a compound or element?

Compounds and Mixtures Do Now # ____

Do Now # ____
Is the air we breathe a compound or mixture?  How can we know?