N
Nitrogen
Atomic Number
7
Atomic Mass
14.01 u
Classification
Nonmetal
Physical State
Gas
📚 Table of Contents
🧪 Element Header & Basic Information
Element Name
Nitrogen
Chemical Symbol
N
Atomic Number
7
Atomic Mass
14.01 u
Classification
Nonmetal
Group
15 (Pnictogens)
Period
2
Physical State
Gas (at STP)

🌟 Key Properties

Nitrogen is a colorless, odorless, and tasteless diatomic gas under standard conditions. It makes up approximately 78% of Earth's atmosphere by volume, making it the most abundant element in the air we breathe. As a member of the pnictogen group (Group 15), nitrogen has five valence electrons and exhibits multiple oxidation states ranging from -3 to +5.

At standard temperature and pressure (STP), nitrogen exists as N₂ molecules with an extremely strong triple bond, making it relatively unreactive despite its abundance. This triple bond (N≡N) is one of the strongest chemical bonds known, with a bond energy of 945 kJ/mol.

Melting Point
-210.00°C (-346.00°F)
Boiling Point
-195.79°C (-320.42°F)
Density (gas)
1.2506 g/L at STP
Electronegativity
3.04 (Pauling scale)