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  2. Nitrogen - Wikipedia

    en.wikipedia.org/wiki/Nitrogen

    Below 35.4 K (−237.6 °C) nitrogen assumes the cubic crystal allotropic form (called the alpha phase). [49] Liquid nitrogen , a colourless fluid resembling water in appearance, but with 80.8% of the density (the density of liquid nitrogen at its boiling point is 0.808 g/mL), is a common cryogen . [ 50 ]

  3. Nitrogen compounds - Wikipedia

    en.wikipedia.org/wiki/Nitrogen_compounds

    The chemical element nitrogen is one of the most abundant elements in the universe and can form many compounds. It can take several oxidation states; but the most common oxidation states are -3 and +3. Nitrogen can form nitride and nitrate ions. It also forms a part of nitric acid and nitrate salts.

  4. Imidogen - Wikipedia

    en.wikipedia.org/wiki/Imidogen

    3 ions with electrons. Depending on the radiation field in the diffuse cloud, NH 2 can also contribute. NH is destroyed in diffuse clouds by photodissociation and photoionization. In dense clouds NH is destroyed by reactions with atomic oxygen and nitrogen. O + and N + form OH and NH in diffuse clouds. NH is involved in creating N 2, OH, H, CN ...

  5. Ammonia - Wikipedia

    en.wikipedia.org/wiki/Ammonia

    The molecule's polarity, and especially its ability to form hydrogen bonds, makes ammonia highly miscible with water. The lone pair makes ammonia a base , a proton acceptor. Ammonia is moderately basic; a 1.0 M aqueous solution has a pH of 11.6, and if a strong acid is added to such a solution until the solution is neutral ( pH = 7 ), 99.4% of ...

  6. Chemical bond - Wikipedia

    en.wikipedia.org/wiki/Chemical_bond

    In (a) the two nuclei are surrounded by a cloud of two electrons in the bonding orbital that holds the molecule together. (b) shows hydrogen's antibonding orbital, which is higher in energy and is normally not occupied by any electrons. A chemical bond is the association of atoms or ions to form molecules, crystals, and other

  7. Nitrification - Wikipedia

    en.wikipedia.org/wiki/Nitrification

    Nitrogen cycle. Nitrification is the biological oxidation of ammonia to nitrate via the intermediary nitrite.Nitrification is an important step in the nitrogen cycle in soil.The process of complete nitrification may occur through separate organisms [1] or entirely within one organism, as in comammox bacteria.

  8. Denitrification - Wikipedia

    en.wikipedia.org/wiki/Denitrification

    Denitrification can lead to a condition called isotopic fractionation in the soil environment. The two stable isotopes of nitrogen, 14 N and 15 N are both found in the sediment profiles. The lighter isotope of nitrogen, 14 N, is preferred during denitrification, leaving the heavier nitrogen isotope, 15 N, in the residual matter.

  9. Hydrazoic acid - Wikipedia

    en.wikipedia.org/wiki/Hydrazoic_acid

    Hydrazoic acid, also known as hydrogen azide, azic acid or azoimide, [2] is a compound with the chemical formula HN 3. [3] It is a colorless, volatile, and explosive liquid at room temperature and pressure. It is a compound of nitrogen and hydrogen, and is therefore a pnictogen hydride. It was first isolated in 1890 by Theodor Curtius. [4]