Final Unit Test Thoughts

I believe the test was fairly easy. There were only a few questions a wasn't sure about, but over all the half-life and average mass questions were not too difficult.

Dating- Radioactive Style Lab

This lab was used to demonstrate how half life works. In the lab there were 567 pieces of paper that were double sided, one side color and one side white. In order to represent half life my partner and I shook up the paper pieces and dumped them out separating the ones that landed on the color side form the ones that did not. We then counted the colored pieces which represented the amount that decayed and repeated the process.

Websites:
Uses of Radioactive Dating
 Radioactive Dating

Radioactive Decay

http://edtech2.boisestate.edu/lindabennett1/images/alpha%20beta%20gamma%20diagram.gif


There a three types of radioactive decay, beta, gamma, and alpha. In Alpha decay the atomic number decreases by 2 and the mass number decreases by 4, in Beta decay the proton count increases by 1 and the mass doesn't change, and in Gamma decay there is no change in the charge.

Websites:
Nuclear Chemistry
Video on Radioactive Decay

Beanium Lab

In the Beanium Lab my partner and I counted how many beans there were all together and then counted out how many beans there were of each kind (white, black, red, and pinto).We then weighed each type of bean and
divided the mass of that type of bean by the amount of bean present to get the average mass of one bean. After figuring out the average mass of each type of bean my partner and I found the average atomic mass of beanium by multiplying the percent abundance of the isotope by the average mass of the isotope, and then we added them together.

Websites: Calculating Average Atomic Mass

Chapter 3

http://study.com/cimages/multimages/16/earlyatomic_models_1.jpg

In Dalton's Atomic Theory it originally stated that all elements contain atoms, all atoms of a given element are identical, atoms of different elements are different, compounds consist of the atoms of different elements, and atoms are indivisible and are not created or destroyed in chemical reaction. However the idea that all atoms of a given element are identical and that atoms are indivisible is not true today.

Websites: Dalton's Atomic Theory
                 More on Dalton's Atomic Theory

Thoughts about Atomic Structure and Radioactivity

On the pre-test for this unit I did not know many of the answers. I recognized the terms Alpha decay and Beta decay, but did not recognize many of the other questions. I hope to learn a lot throughout this unit and improve my knowledge of atomic structure and radioactivity.