Nitrogen (N₂) (intermediate)

Nitrogen (N₂) (intermediate)

A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.

Chemistry

Keywords

nitrogen, nitrogen molecule, homonuclear molecule, bond structure, covalent bond, sigma bond, pi bond, triple bond, nonpolar, inert gas, air, ammonia, nitrogen cycle, nitrogen-fixing bacterium, inorganic chemistry, chemistry

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Nitrogen cycle

Atmospherical nitrogen is bound by bacteria and used by living organisms in the form of various compounds.

Structure of nitrogen molecules

This animation demonstrates the structure of nitrogen molecules, with one sigma and two pi bonds holding the atoms together.

Formation of hydrogen molecules

Hydrogen atoms within hydrogen molecules are held together by a covalent bond.

Hydrogen (H₂)

Colourless, odourless, lighter-than-air gas. The most common chemical element in the universe.

Hydrogen sulphide (H₂S)

A colourless, toxic gas with the characteristic odour of rotten eggs. It occurs in certain mineral waters and spring waters.

Molecule exercises I (Bonds)

An exercise about different types of bonds.

Nitrate ion (NO₃⁻)

A compound ion, the main source of nitrogen for plants.

Nitrogen (N₂) (basic)

A colourless, odourless, non-reactive gas, it constitutes 78.1% of Earth´s atmosphere.

Nitrogen monoxide (Nitric oxide) (NO)

A colourless, heavier-than-air gas, an intermediate in the production of nitric acid.

Nitrogen-dioxide (NO₂)

A reddish-brown toxic gas, very reactive due to its unpaired electron.

Oxygen (O₂) (intermediate)

A colourless, odourless gas, an important component of the atmosphere, indispensable to sustain terrestrial life.

Water (H₂O)

Water is a very stable compound of hydrogen and oxygen, vital for all known forms of life. In nature it occurs in liquid, solid and gaseous state.

Ammonia (NH₃)

Ammonia is a colourless gas with a characteristic pungent smell. Its solution in water is called ammonium hydroxide or household ammonia.

Ammonium ion (NH₄⁺)

A compound ion generated when a proton is added to an ammonia molecule.

Producing ammonia from nitrogen gas and hydrogen gas

Large-scale ammonia production requires high temperature and pressure and the presence of iron as a catalyst.

Reaction of ammonia with hydrogen chloride

Ammonium chloride is the result of the reaction of ammonia and hydrogen chloride

Nitric acid (HNO₃)

One of the oxoacids of nitrogen. A colourless compound with a pungent odour, a strong oxidant.

Nitrous acid (HNO₂)

One of the oxoacids of nitrogen. Colourless, moderate acid with a pungent odour, that exists only in aqueous solution.

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