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Stay on top ... Hydrogen is a chemical element belonging to the family 1 therefore has one electron in its outer. Phosphorus (P) belongs to the family 15 has five electrons in the last layer electronics. The element oxygen (O) has six electrons in its outer, belonging to 16 families Covalent binding with the hydrogen element (H) is two electrons in the last layer, such as helium (He), an inert gas. The elements phosphorus (P) and oxygen (O) acquire electronic distribution of other noble gases with nearest configuration (eight electrons in the last layer). Likewise, for the formation of deoxyribose, carbon atoms (C), oxygen (O) and hydrogen (H) are joined by covalent bonds. See: Finally we have the nitrogenous bases. The purine bases chemical structures are formed by two closed chains, also known as rings. They are: adenine (A) and guanine (G). Forming pyrimidine bases, we have four carbon atoms and two nitrogen in a closed chain. We cytosine in DNA (C) and thymine (T).
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Ostati na vrhu ... Vodik je kemijski element pripada obitelji 1 zbog toga ima jedan elektron u njegov vanjski. Fosfor (P) pripada obitelji 15 ima pet elektrona u posljednjih sloj elektronike. Element kisika (O) ima šest elektrona u njegov vanjski, koji pripadaju 16 obitelji Kovalentni obvezujuća s element vodika (H) je dva elektrona u posljednjem sloju, kao što su helij (He), inertni plin. Elementi fosfor (P) i kisik (O) stjecanje elektroničku raspodjelu drugih plemenitih plinova s najbliže konfiguracije (osam elektrona u posljednjem sloju). Isto tako, za formiranje deoxyribose, ugljikovih atoma (C), kisik (O) i vodika (H) su se pridružili kovalentno. Vidi: Konačno imamo dušičnih baza. U purinskih baza kemijske strukture su formirane po dvije zatvorene lancima, također poznat kao prstenje. Oni su: adenin (A) i guanin (G). Formiranje pirimidinskih baza, imamo četiri atoma ugljika i dva dušika u zatvorenom lancu. Smo citozin u DNA (C) i timin (T).