CHEMISTRY

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Alloys, Plastics and Polymers ·without alloys, everything wouldn´t have a special struccture ·plastic is cheep, but it is toxic so it isn´t to good for our society ·polymer is not toxic so it can be used insted plastic. so without this things our society could be organazed and would be a disaster.

MAGNESIUM


 * Atomic Number:** 12
 * Atomic Weight:** 24.3050
 * Melting Point:** 923 K (650°C or 1202°F)
 * Boiling Point:** 1363 K (1090°C or 1994°F)
 * Density:** 1.74 grams per cubic centimeter
 * Phase at Room Temperature:** Solid
 * Element Classification:** Metal

it is the eighth most abundant element in the universe and the seven most abundat element in the earth´s crust, magnesium is never found free in nature. Magnesium was discovered by Sir Humphry Davy, an English chemist. Magnesium is a ductile, silver-white, chemically active metal with a hexagonal close-packed crystalline structure.it also forms many compounds like: The oxide, hydroxide, chloride, carbonate, and sulfate.

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CARBON 14 Is a radioactive isotope of carbon discovered on february 27, 1940, by maris a radioactive isotope of carbon discovered on February 27, 1940, by Martin Kamen and Sam Ruben at the university of california radiation laboratory in berkeley. There are three naturally occuring isotopes of carbon on Earth: 99% of the carbon is carbon-12. 1% is carbon-13, and carbon-14 occursin trace amounts. The atomic mass of carbon-14 is about 14.003241 amu.


 * ~ **Carbon-14** ||


 * ~ **General** ||


 * [|Name], [|symbol] ||  || radiocarbon,14C ||


 * [|Neutrons] ||  || 8 ||


 * [|Protons] ||  || 6 ||


 * ~ **Nuclide data** ||


 * [|Natural abundance] ||  || 1 part per trillion ||


 * [|Half-life] ||  || 5,730 ± 40 years ||


 * [|Isotope mass] ||  || 14.003241 [|u] ||


 * [|Spin] ||  || 0+ ||


 * ~ **[|Decay mode]** ||  ||~ **[|Decay energy]** ||


 * Beta ||  || 0.156476[|[1]] [|MeV] ||