Chemistry week 3

1. The Transitional Metal I chose is Chromium. It's symbol is Cr and it's atomic number is 24. So it has 24 electron and 24 protons. It's atomic mass is 52. So it has 28 protons. It is a very shinny grey, brittle metal with a high melting point. The electric configuration for chromium is 4S1, 3D5. Chromium oxide was first used in the Qin Dynasty to coat weapons for war. Nearly all chromium is extracted from chromite. Chromium is known for it's strong magnetic properties. Chromium compounds are found in the environment and it is the 22nd most abundant element.

2. Neptune's Medicine Chest
I really liked the article on Bill Fenical and thought it sounded like it could have a lot of promise. The ocean takes up a much bigger portion of the world then land does. So I think it we should definitely be looking for organisms to research in the ocean. The ocean has a lot of mystery to it, so we should see what it has to offer. It also seems like Fenical has already has some success, which shows the ocean does have things to offer. I also like Fenical determination and how he is training so many people. When he is gone it looks like his work will be continued.

3. I read the article "Avoiding Waste: Atom Economy". It was a little hard to understand but the basic concept was that green chemistry wants to reduce the amount of pollution created in chemical processes. Then it explained about an equation called the atom economy which is a ratio that lets us know the percent of the reactant's atom that goes into the desired product. That is a little over my head but I always like to hear about people making effort to go more green. I think trying to go more green in Chemistry is a good idea since a lot of chemicals can be let off during reactions.

Chemistry Week 2

1. I chose the element Magnesium, Mg. It's atomic number is 12. So it has 12 protons and 12 electrons. Its atomic mass is 24, so it has 12 protons. Magnesium is naturally present in our body, in foods, added to foods and in some medicines. It is a cofactor in over 300 enzyme systems and involved in many chemical reactions in the body. Studies show that the average person does not ingest enough calcium daily. Magnesium can be found in many foods. There are also many supplements out there with magnesium in them. Studies showed that people that take Mg supplements suffer less from Mg deficiency then people who do not take them. The groups most at risk for suffering from Mg deficiency are people with gastrointestinal diseases, people with type II diabetes, people who abuse alcohol and older adults. I copies and pasted the link below where I got this info if anyone wants to look at it.

http://ods.od.nih.gov/factsheets/Magnesium-HealthProfessional/


2. I liked the lecture and learning further about elements and the periodic table. I was disturbed by some of the articles we read though involving the chemical leaks into water. I think this kind of thing is so sad and happens way too much today. Companies are more worried about making money then the people using their products. This company was more concerned about making money and covering up the leak then the people drinking the water. I do not understand how these people sleep at night. This could possibly have some serious consequences for some people. I do not think there is any excuse. I would rather lose my job and be broke then put anyone else's life at risk!

3. The link I looked at was the elements, compounds and mixture link. This gave me a clear description of the differences between elements compounds and links. It also gave me a clear picture on the difference between a atom and molecule.

My Bio

My name is Claire Soper. I was born and raised in Tucson, Arizona. I came to California to attend Saint Mary's College where I played on the tennis team and graduated with a bachelor in Kinesiology. After graduating I took a job at a near Country Club coaching tennis and running the junior program. I was unhappy with this job and felt like I had a bigger calling. Looking into other careers I found TCM. I had been receiving TCM treatment for years but had not known it was Chinese Medicine. I was receiving a type of acupressure treatment that had helped me a lot. He has cured me from so many different things! I want to do something that I have personal experience that I know works and I know this works. I am very excited about this new life experience I have just started!

Quiz Answers

1.
A. Burning wood is a chemical change

B. Crushing a rock is a physical change

C. I put dissolving sugar in water as a chemical change but the answer showed it to be a physical change

D. I put the rusting of iron as a physical change but the answer showed it as a chemical change

2.
A. I put milk as a pure substance because I thought when it comes from a cow it would be pure.  But the answer showed it as a mixture

B. Salt is a mixture

C. I put sugar as a mixture but the correct answer is that it is typically a pure substance

D. I put steel as a pure substance but the answer showed it is a mixture of iron and carbon

3. I put a cup of black coffee is considered to be a homogeneous and a pure substance but the answer showed black coffee considered to be homogeneous but not pure

4. I put the boiling of water is considered to be a physical change and the temperature at which water boils is considered a chemical property but the answer said the boiling of water is a physical change but the boiling point is not a chemical property.