Nitrogen

Because the nitrogen in the air is in a form not usable to animals and plants. The only way animals get nitrogen to build protein and nucleic acid is by eating it. This is usually through plants, which get there nitrogen from the soil. They get it from the soil because bacteria in the soil turn the atmospheric nitrogen into a usable form.

In a water ecosystem cyanobacteria (a.k.a. blue-green algae) transform the nitrogen from the atmosphere into usable forms of nitrate

When the animals breathe in nitrogen it goes into their bodies so when they die and decompose the nitrogen they breathed in is now in the soil and also when they fertilize on the land.

Nitrogen compounds known as Nitrates found in the soil

N2

plants take in nitrogen compounds through their roots.

Nitrogen is the most abundant element in the Earth's atmosphere. Bacteria in the soil 'fix' the nitrogen gas into compounds which can be taken in by plants; the plants get eaten by animals & they use the nitrogen to make proteins.

wcovalency means the max number of electron an atom can share with others.

nitrogen can share 5 but due to the absence of d orbital it can only share 4.

therefore the actual covalency in 4.

Hydrogen and Oxygen are essential for life because of the tasks they preform. Hydrogen, which is taken in through H2O as well as H2, is used for the transfer of energy for many vital systems. Oxygen is used for much of the same thing; transferring sugars to muscle fibers and vital organs.

Yes

dry ice −56.4 °C and liquid nitrogen is −196 °C

N=3

I=2.6

You do the math.

3<2.6x3

what are the chemical properties of nitrogen

As of 2010, the Bose-Einstein condensate state of matter has only been achieved in temperatures of 10-7 K in many alkali and alkaline earth metals' isotopes.

They include: 7Li, 23Na, 39K, 41K, 85Rb, 87Rb, 133Cs, 52Cr, 40Ca, 84Sr, 86Sr, 88Sr, and 174Yb

The symbol for nitrogen is N.

because these 4 elements that are listed are the most common elements on planet earth. most percentage of the eart is made of there 4 elements but not all some elments like iron are also there but a extremly small percentage

One mole of atoms of an element is equal to the atomic mass of that element expressed in grams.

Nitrogen-14

so one mole of nitrogen weighs 14 g

molecules of nitrogen bounce off from each other and don't stick together

Two electrons in the first shell (closest to the nucleus), then five on the next shell out, usually shown as a pair and 3 singles.

nitrogen helps to make protein, which is important for growth.

if a plant won't get nitrogen, it's growth will be slow and it will have small pale leaves :)

Sodium Atom has a larger atomic radius than chlorine, because as we go across the period the nuclear charge (charge on the atom) increases, also outermost electrons occupy the same principle energy level as we go across the period(3 sub energy level) so the electrons in chlorine are held more closely and tightly together than that of sodium....so sodium has a larger atomic radius

No2&Nal

Because nitrogen is usually very unreactive, it is only commonly found in internal combustion engines (car engines) where the temperature is high enough to make the nitrogen react.