(E) Chemistry in Our Live

                 Chemistry. Many people doesn’t like this word, and the student hate this lesson in the school. But, if we know, chemistry is around you. For example, You breath the air everyday, everytime, every where. But, you didn’t knew what the air included. Did you know, air included oksigen (O₂)for our live. Oxygen is a chemical unsure. In this time, I want to tell you about what chemistry is it. It diveded into a three part; the simple theory of chemistry, sistem of periodic unsure and the advantages and disadvantages of Chemistry.

                The first one is what is chemistry? Chemistry is the study about chemicals and there’s chemicals character. Atom is the part of builded chemical element. Atom devided into two parts, there are unsure atom and combination atom. Unsure atom is a individual atom and doesn’t contact with others atom. For example, Carbon (C), Floride (F), Cloride (Cl) and many more. Combination is opositte to unsure, Combination atom is either two atom or more atom bounded into one atom. The atom can from same unsure such as, Oxigen (O₂) or from others like carbon monoxide (CO). There are many unsure atom and combination atom in the world. In this case, that is just a simple atom theory, if you was interested in chemistry, you can learn more harder because chemistry is more difficult than you think.  

                The second is sistem of periodic unsure. When we studied chemistry, we must know about this periodic sistem. Periodic unsure was prepared by Dmitri Mendeelev in 1869. Periodic sistem contains of 118 unsure. There were devide into 2 grup. The A grup and B grup (transision grup). The A grup has 8 catagory; Alkaline Metal, Alkaline Earth Metal, Boron, Carbon. Nitrogen, Oxygen, Halogen and Noble gas. The B grup is a transisition unsure, same with a grup there 8 catagory. Devided of periodic sistem based on character of the unsure.  The adventages of periodic unsuse are we know the character of that atom, such as liguid (H₂O), solid (Ca), gas (H₂)or  Aques (H₂SO₄). With periodic unsure we can know the number of atom too. For example, Oxygen (O₂) the number of atom is 6. Number of atom helped you to found elevation electron.

               The last is advantages and disadvantages of chemistry. The advantages of chemistry, we can see in farmacy worked, there are many drug for all disease in the world. It is because chemistry chemical very usefull for pharmacist to make a drug. In the other field, Chemistry is important in agriculture or may be in millitery. There are just a little adventages of chemistry in our live. But the chemistry even make a bad side. With chemistry, people can make a bom. for example,  Natrium (Na) and water (H₂O), if there were contacted, it would be exploded. But, it just a little bom. The more combination can make a big bom and a fire.

                In conclution, Chemistry is not horrible than we think. You can learn chemistry enjoyable. I think chemistry very interesting. There were had periodic sistem to helped you learned chemistry. But if you know, chemistry not ussually have an adventages. Chemistry has a disadvantages too. Don’t panic, the controlled laboratory could save you from the accident what didn’t want. Happy learning chemistry J