Nitrogen (N)

From Wikipedia, the free encyclopediaNitrogen is a chemical element with symbol N and atomic number 7. It is the lightest pnictogen and at room temperature, it is a transparent, odorless diatomic gas. Nitrogen is a common element in the universe, estimated at about seventh in total abundance in the Milky Way and the Solar System.

Nitrogen in the periodic table

SymbolN
Atomic number7
Group15
Period2
Blockp
Element categoryNonmetal

Physical properties

Phase at STPGas
Density1.251 g/cm3
Atomic weight14.007 u
Melting point63.15 K
-210 °C
-346 °F
Boiling point77.355 K
-195.795 °C
-320.431 °F

Atomära egenskaper

Electronegativity (Pauling Scale)3.04
Electron affinity-6.8 kJ/mol
Ionization energies
11402.3 kJ/mol
2 2856 kJ/mol
3 4578.1 kJ/mol
4 7475 kJ/mol
5 9444.9 kJ/mol
6 53266.6 kJ/mol
7 64360 kJ/mol

Electron configuration

Electron configuration1s2 2s2 2p3
Electrons per shell2, 5

History

Discovered1772
Discovered byDaniel Rutherford
Named byJean-Antoine Chaptal