Friday, September 30, 2011

Nuclear Chemistry



















Alpha, Beta, and Gamma Rays


















Alpha- the radition that was reflected toward the negatively charged plate.







Beta-the radiation that was reflected toward the positively charged plate.






Gamma- High-energy radition that possess no mass.






Difference Between Fusion and Fission






Fission- a nuclear reaction in which the nucleus splits into smaller particles

















Fusion- the process by which two or more atomic nuclei join together


























Production of Nuclear Energy






Nuclear energy is the controlled use of nuclear reactions to release energy for various reasons. It's pros are that it's used in medicine and as reuseable energy. A con is that it's a highly dangerous energy and it causes a large amount of pollution such as in the air and water.



Friday, September 23, 2011

Letter to the Recycling Factory

To whom it may Concern,

The city of Westminster hired me to separate various substances from a complied pile. The items were ground up into a fine powder and can not be phyically separated. The items and their densitys are:
aluminum soda cans: 2.7 g/cm^3
steel cans: 5.7 g/cm^3
milk jugs: .95 g/cm^3
soda bottles: 1.4 g/cm^3

First, separate the steel from the powder. Use the magnets hanging above the conveyor belt to attract the steel from the pile. Since steel is magnetic, it'll shift through the pile and stick onto the magnets.

Second, put the remaining powders in the large tank provided by Mr. Smith. As the powders sink, one will float up. The floating powder is the crushed milk jugs. Then, you'd use the net to skimming nets to pull the milk jug powder out.

Third, I used the the concentration of sugar water to make one type of powder to float. Since the sugar water has a density of 1.5 g/cm^3, the soda can powder will float at the top. Once they rise to the surface, use the skimming nets to obtain the powder.

Lastly, drain the sugar water from the remaining powder which is the aluminum can powder. And finally you have finished.


Cityana Koregma

Friday, September 2, 2011


















































Why Chemistry is an Important Science?



The definition of chemistry is the chemical reaction matter undergoes. Without chemistry, we wouldn't be able to understand how our bodies digest food, how some foods are made, how metabolism gives us energy. These are just a few examples of how chemistry is so important in our lives.