Nitrogen in air, A major component of the‘s in the form of (78%) with oxygen (21%), nitrogen is present in many organic and inorganic compounds.
- Symbol: N
- Atomic number: 7
- Electrons by : 2, 5
- Atomic mass: 14,007 u
- Most stable isotopes: 15 N stable with seven (99.634%), 15 N stable with eight neutrons (0.366%)
- Series: Nonmetals
- Group, period, block: 15 (VA), 2, p
- Density: 0.00125
- Point of : -210 ° C
- Boiling point: -196 ° C
Nitrogen in Air history
Compounds including nitrogen, such as saltpeter, have been known since antiquity, but theof this element is attributed to Rutherford in 1772, and independently by Cavendish and Scheele.
The term “nitrogen”, proposed by Lavoisier and forged since Greek, means “deprived of life” because, unlike theof the , nitrogen does not contribute to living. The symbol N comes from the Latin nitrogenum, itself derived from the Greek nitron gennan, “saltpeter trainer”.
Properties of Nitrogen
In, nitrogen is a diatomic colorless and odorless. Nitrogen is trivalent in most compounds.
Nitrogen is generally inert but reacts spontaneously withand . The triple bond in the dinitrogen is one of the strongest known.
Use of nitrogen
The main use of nitrogen is in the manufacture of, an important industrial ingredient, mainly used in fertilizers (which cause an increase in nitrate levels in ) and to produce nitric
nitrogen (actually nitrogen) is a common refrigerant used for the storage of biological samples.
Some explosives such as trinitrotoluene (the famous) and nitroglycerin contain nitrogen. The gaseous dinitrogen is, among others, used as an inflation gas and in furnaces for the manufacture of highly oxidizable .
Effects of nitrogen on health
Nitrates can cause a decline infunction, as well as a . Nitrates such as nitrite can cause nitrosamides, most of which are to many organs. Nitrogen is also present in cyanide (CN – ) . Compounds containing it are highly toxic.
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