PD+1+-+Nitrogen+Cycle

THE NITROGEN CYCLE:
 * || 7 ||
 * ** Atomic mass ** || 14.0067 g.mol -1 ||
 * ** Electronegativity according to Pauling ** || 3.0 ||
 * ** Density ** || 1.25*10-3 g.cm-3 at 20°C ||
 * ** Melting point ** || -210 °C ||
 * ** Boiling point ** || -195.8 °C ||
 * ** Vanderwaals radius ** || 0.092 nm ||
 * ** Ionic radius ** || 0.171 nm (-3) ; 0.011 (+5) ; 0.016 (+3) ||
 * ** Isotopes ** || 4 ||
 * ** Electronic shell ** || [ He ] 2s22p3 ||
 * ** Energy of first ionisation ** || 1402 kJ.mol -1 ||
 * ** Energy of second ionisation ** || 2856 kJ.mol -1 ||
 * ** Energy of third ionisation ** || 4578 kJ.mol -1 ||
 * ** Discovered by ** || Rutherford in 1772 ||



In a nitrogen cycle there are many types of oraganisms like plants, animals, and bacteria that helps the cycle keep its flow. Basic human acivity also contributes to the nitrogen cycle.

[]> Diagram of the nitrogen cycle. []> aquairum nitrogen cycle. [] > [] [] [] "ALSO HELPED FOR FINDING INFO BY GROUP 6 " Nitrates and nitrites are known to cause several health effects. These are the** Nitrogen combined with H3 produces ammonia, which can be toxic when u inhale Your should use adequite venalation. reference: is in coordanence with ammonium solfate which is manufactured for its widespread of fertilizer use but its only drawback is that it leaves an acidic residue in the soil. reference: Harmful algal blooms may cause harm through the production of toxins or by their accumulated biomass, which can affect co occurring organisms and alter food-webs world wide. Impacts include human illness and mortality following consumption of or indirect exposure to HAB toxins, substantial economic losses to coastal communities and commercial fisheries, bird and mammal mortalities. - Reactions with haemoglobin in blood, causing the oxygen carrying capacity of the blood to decrease (nitrite) - Decreased functioning of the thyroid gland (nitrate) - [|Vitamin A] shortages (nitrate) - Fas mainly nitrite may cause various health effects in humans and animals. Food that is rich in nitrogen compounds can cause the [|oxygen] transport of the blood to decrease, which can have serious consequences for. High nitrogen uptake can cause problems in the thyroid gland and it can lead to vitamin A shortages. In the stomach and intestines nitrates can form nitroamines; dangerously carcinogenic compounds.hioning of nitro amines, which are known as one of the most common causes of cancer (nitrates and nitrites) SOME GOOD FACTS ABOUT NITROGEN
 * information about the harmful effects of nitrogen cycle the fellowing info is off the link,

Nitrogen makes up 78% of our air, by, blue-violet, and deep violet shades to the aurora. its nickname is azote, the meaning is without life its active compounds are found in foods, poisons, fertilizers, and explosives Nitrogen can also be prepared by heating a solution of ammonium nitrite When nitrogen is heated, it combines directly with magnesium,, or calcium; when mixed with oxygen and subjected to electric sparks

The element is important to live because it helps growth.It also important to live reproduction of plants and animals it also important to people because muscles,tissue,organs

When can this elment be harmful to life?
 * [[image:http://www.chemicalelements.com/bohr/b0007.gif width="213" height="211" caption="[Bohr Model of Nitrogen]"]] ||  || **Number of Energy Levels:** 2 **First Energy Level:**
 * Second Energy Level:** ||

Nitrogen can be harmful to the environment when it helps make algal blooms that can harm aquatic organisms by taking oxygen out of the water and not letting much light in which can harm photosynthetic organisms. Some of the growing algae produce toxins which can also affect aquatic life. Too much nitrogen use reduces soil fertility, promotes weed growth and can also increase the risk of pests and agricultural disease. It can also affect humans through air and water pollution. It causes reactive airways disease, compromises the immune system,increase allergic responses, and causes reproductive problems.