2. Nitro
• an essential part of the amino acids. It is a
basic element of life.
gen
n + es‘‘nitre forming’’
• composes about four-fifths (78.03 percent)
by volume of the atmosphere.
•in the form of protein is an important
constituent of animal tissue.
• is an important element in plant nutrition.•is inert and serves as a diluent for oxygen in
burning and respiration processes.
3. Position in Periodic Table
• It is placed in the p-block .
• It belongs to the 15th group.
5. Properties of Nitrogen
• Colourless, Odourless gas.
• Slightly soluble in water.
• Chemically unreactive at ordinary
temperature.
6. Inference
• Symbol
• Atomic Number
• Atomic mass
• Electronic Configuration
• Valency
• Physical state
• Colour
N
7
14
2,5
3
Gas
Colourless
7. Nitrates through lightning-
Nitrogen Fixation
• During lightning nitrogen in atmosphere
combines with O2 to form nitric oxide(NO).
• Ie, at high temparatures.
N2 + O2 2NO
When this combine with more O2, what
happens?
2NO + O2 2NO2
8. • NO2 dissolves in water to form nitric acid, and
reaches the soil.
• And changes to nitrate salt.
• Root plants take up these nitrate salt.
• And converted into aminoacids, which unite to
form plant proteins.
• Nitrogen fixation can also be carried by certain
bacteria.
9. Organic Wastes
for the growth of plants
• Vermi compost
• Green Manure
• Bone meal
• Ash
• Cowdung
• Fish manure……
These all contains ammonia
10. Ammonia
• Chemical formula : NH3
• Density : Less than air
• Smell : Pungent Smell
• Colour : Colourless
