Rigel 
Nitrogen is the first element in column 15 of the periodic table. It is part of the group of “other” nonmetal elements. Nitrogen atoms have seven electrons and 7 protons with five electrons in the outer shell. Nitrogen plays an important role in the life of plants and animals through the nitrogen cycle.
The element nitrogen
Symbol: N
Atomic Number: 7
Atomic Weight: 14.007
Classification: Gas and nonmetal
Phase at Room Temperature: Gas
Density: 1.251 g/L @ 0°C
Melting Point: -210.00°C, -346.00°F
Boiling Point: -195.79°C, -320.33°F
Discovered by: Daniel Rutherford in 1772
Characteristics and Properties
Under standard conditions nitrogen is a colorless, tasteless, odorless gas. It forms diatomic molecules, which means that there are two nitrogen atoms per molecule in nitrogen gas (N2). In this configuration nitrogen is very inert, meaning that it doesn’t typically react with other compounds.
Nitrogen becomes a liquid at -210.00 degrees C. Liquid nitrogen looks like water.
Common compounds with nitrogen atoms include ammonia (NH3), nitrous oxide (N2O), nitrites, and nitrates. Nitrogen is also found in organic compounds such as amines, amides, and nitro groups.
About The Author
Doyen Altair 
Aurora