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Instituto Bilingüe Stanford
Middle School – 8TH Grade
“The Human Reproductive System”

Name Gerardo Avendaño Ramírez Date May, 19, 2010

1.- What is organic chemistry?The study of the structure, properties, composition, reactions, and preparation of carbon-based compounds, hydrocarbons, and their derivatives.

2.- Which are the most abundantelements in the universe?
Hydrogen, Helium, Oxygen, Neon, Nitrogen, Carbon,

3.- Is Carbon the most abundant?
No, is hydrogen

4.- What is the atomic number of Carbon?
65.- What is the atomic weight of Carbon?
12.0107

6.- What is Carbon-14 ?
is a radioactive isotope of carbon with a nucleus containing 6 protons and 8 neutrons. Its presence inorganic materials

7.- What is it used for?
Indicates how time has, what was a living thing.

8.- Mention the different forms of carbon and their uses.
Amorphous carbon isformed when a material containing carbon is burned without enough oxygen for it to burn completely. Graphite, one of the softest materials known, is a form of carbon that isprimarily used as a lubricant. Diamond, the third naturally occurring form of carbon, is one of the hardest substances known.

9.- What are Alkanes?
are chemical compounds that consistonly of the elements carbon (C) andhydrogen (H)

10.- What is the general formula of Alkanes?
CnH2n + 2

11.- Write the structural and molecular formulas of the first tenAlkanes.

|Alkane |Formula |
|Methane |CH4 |
|Ethane |C2H6 |
|Propane |C3H8 |
|Butane |C4H10 |
|Pentane |C5H12 |
|Hexane |C6H14|
|Heptane |C7H16 |
|Octane |C8H18 |
|Nonane |C9H20 |
|Decane |C10H22 |
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