The Test was Alright....

Today we took the unit test over Atomic Structure and Radioactivity. This test mostly focused on Daltons atomic theory, the types of radiation, how to calculate half life's and average mass equations, acids and polyatomics, fusion and fission, and we also had to be able to read graphs. I am not sure how I did on this test. I think I did okay but I could have messed up on some problems from overthinking them. I know though, that I need to go over half life questions because those were the most difficult questions for me. Although I am not sure how I did, I did a lot of studying I read the text book pages, watched videos, and focused in class.
Here is a link to a video to help with half life.

Freaking out for nothing

Today we took our first quiz in the unit Atomic Structure and Radioactivity. During this section we learned about how to find the protons, neutrons, and electrons of each element and also learned the formula that helped us calculate the average atomic weight of isotopes. Before this quiz I was freaking out because I thought there were going to be very difficult answers so I study a decent amount last night and this morning right before the test. This studying paid off because I believe I ended up doing pretty well. One thing that helped me study was being able to look back on all of my notes that I took from this unit and last. These notes really help me. Also there are a couple Bohzeman videos that explain the periodic table and show you where to find different things on it. This was also very helpful. Compared to the pre-test that we took awhile ago I feel confident that I have gained more knowledge on this subject.

Bohzeman Videos can be watched here!

Beanium Lab

Today in class we did the beanium lab. During this lab we had to: identify the number of beanium isotopes, determine the mass of each isotope, find the percent abundance in each isotope, and calculate the average atomic mass of beanium. In order to find this we had to use a balance, a sample of beanium, and a calculator. In order to start the lab we had to count the total number of beanium atoms in the sample, which was 44. After counting them we had to separate them out into different isotopes these isotopes included: white beanium (10), black beanium (7), red beanium (5), and pinto beanium (22). After counting the isotopes we had to measure the mass of all of the atoms in that specific isotope. One thing we had to make sure we did before this is zero the balance out. Next, my lab partner and I had to calculate the average mass of this isotope. In order to do this we had to divide the number of atoms of the isotope by the total mas of all the atoms of this isotope. Then, we had to find the percentage abundance of the isotopes. To do this we had to divide the number of atoms of the certain isotope by the number of total atoms. Lastly, we had to calculate the average atomic mass of beanium. This lab is important because it taught us how to calculate the average mass of an individual isotope, the percent of abundance, and the average atomic mass of beanium.

 

Atomic inference activity

Yesterday we completed an inference activity. In this activity there were covered plates with different designs and a marble. What we had to do was roll the marble around and try to infer what shape or design was without being able to see it. After a couple minutes of trying to figure out what shape it was me and my lab partner wrote down our inferences and then uncovered the plate. Most of the time we ended up being wrong. One thing that was hard about this lab was that we couldn't see what we were doing. This is comparable to Ruthfords experiment where he bounced things off the atom trying to find the structure of it.

Atomic theory

Today in class we learned about the atomic theory, law of conservation, and new discoveries of the atom. First, Dalton's theory stated: that elements are made up of tiny particles called atoms, all atoms of a given element are identical, the atoms of a given element are different from those of any other element, atoms of one element can combine with atoms of other elements to form compounds, atoms are indivisible in chemical processes and are not simply created or destroyed. We also learned that points number 2 and number 5 are invalid because of new information that has come about. Next, we learned about the law of constant composition. What this means is that every compound of the same species are always put together in the same order. For example, water is always 2 hydrogen's and an oxygen. Lastly, we learned about new discoveries of the atom. JJ Thomson was the person who discovered electrons by using a cathode ray to show the atoms of any element emit particles with a negative charge. This is shown through the plum pudding or chocolate chip model. Ruthford used the gold foil experiment to prove the presence of a positively charged center in an atom. Finally, the current model is the cloud model where electron location is pinpointed using probability.

http://www.humanthermodynamics.com/Atom_diagram.jpg


Atomic theory song here!
The history of the atom/Crash Course here!
Here is a website that may help with Atomic Theory here!
Atomic theory timeline here!