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  1. Extraction (isolation) of nitrogen 1 Cryogenic Distillation of air About 85% of nitrogen ... technique permits to separate air to its constituents: nitrogen , oxygen and argon. 2 Membrane separation of air It is ...

  2. 1st : Nitrogen does not react readily with other elements or compounds. 2nd... first statement is false. Under certain conditions, nitrogen can reacts with reactive non-metal and reactive metals. For example...

    分類:科學及數學 > 化學 2008年06月15日

  3. free-living nitrogen fixing bacteria convert nitrogen gas into nitrogenous compounds...in the root nodules of leguminous plants also convert nitrogen gas into nitrogenous compounds . The leguminous plants obtain the nitrogenous ...

    分類:科學及數學 > 生物學 2011年11月23日

  4. Nitrogen is a chemical element which has the symbol N and atomic number..., constituting 78.1% by volume of Earth's atmosphere. Nitrogen is a constituent element of all living tissues and amino ...

    分類:科學及數學 > 化學 2007年10月04日

  5. Physical properties: 1. Nitrogen has a melting point of -210C and boiling point of...

    分類:科學及數學 > 化學 2008年06月11日

  6. Nitrogen 嚴格黎講並不是inert gas。 雖然 nitrogen molecule裏面既 nitrogen atom係連得好實 (因為...如果低過呢個溫度,條鎢絲會發唔到光),喺呢個相當高溫高能量既環境之下, nitrogen molecule會被爆開成為一個個atom,而呢d atom因為本身個electronic structure唔係一個octet...

    分類:科學及數學 > 化學 2009年06月09日

  7. The chinese meaning of " nitrogen oxide" is 氮氧化物。 氮氧化物指的是只由氮、氧兩種元素組成的...be used to refer to any of these oxides (oxygen compounds) of nitrogen , or to a mixture of them: Nitric oxide (NO), nitrogen (II...

  8. ... between a hydrogen atom and the lone pair of a veryelectronegative atom (for example, nitrogen atom). To form a hydrogen bond, the hydrogen atommust carry a high density of positive...

    分類:科學及數學 > 化學 2014年07月23日

  9. ... as an oxidizer in the fuel systems of large rockets Nitrogen - in a wide variety of important manufactures, including ammonia, nitric...

    分類:科學及數學 > 化學 2007年11月09日

  10. ...for Helium, 8 for all others), making them stable. Nitrogen gas consists of diatomic molecules, each of which has the chemical...