Forumul RUFOn este din nou funcțional după ce a primit un upgrade important de software și rulează acum pe un server nou.
Creat de CHIP, 30 Mai 2010, 20:34:49
0 Membri şi 1 Vizitator vizualizează acest subiect.
CitatCarbon is the 15th most abundant element in the Earth's crust, and the fourth most abundant element in the universe by mass after hydrogen, helium, and oxygen. It is present in all known lifeforms, and in the human body carbon is the second most abundant element by mass (about 18.5%) after oxygen. This abundance, together with the unique diversity of organic compounds and their unusual polymer-forming ability at the temperatures commonly encountered on Earth, make this element the chemical basis of all known life
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