Азот

7
N
Група
15
Периода
2
блок
p
Protons
Electrons
Neutrons
7
7
7
Општи Својства
Атомски број
7
Атомска тежина
14,0067
Mass Number
14
Category
Неметали
Color
Colorless
Radioactive
Не
From the Latin word nitrum, Greek Nitron, native soda; and genes, forming
Кристална структура
Simple Hexagonal
History
Nitrogen is considered to have been discovered by Scottish physician Daniel Rutherford in 1772, who called it noxious air or fixed air.

It was also studied at about the same time by Carl Wilhelm Scheele, Henry Cavendish and Joseph Priestley.

In 1790 the French chemist Jean-Antoine-Claude Chaptal named the element nitrogen.
Electrons per shell
2, 5
Електронска конфигурација
[He] 2s2 2p3
N
Nitrogen is present in all living organisms, in proteins, nucleic acids and other molecules
Физички Својства
Фаза
Gas
Густина
0,0012506 g/cm3
Точка на топење
63,15 K | -210 °C | -346 °F
Точка на вриење
77,36 K | -195,79 °C | -320,42 °F
Топлина на топење
0,36 kJ/mol
Топлина на испарување
2,79 kJ/mol
Specific Heat Capacity
1,04 J/g·K
Abundance in Earth's crust
0,002%
Abundance in Universe
0,1%
Vial
Кредити на слика: Images-of-elements
Vial of glowing ultrapure nitrogen
CAS Number
7727-37-9
PubChem CID Number
947
Атомски Својства
Атомски полупречник
56 pm
Ковалентен полупречник
71 pm
Електронегативност
3,04 (Полингова скала)
Ionization Potential
14,5341 eV
Atomic Volume
17,3 cm3/mol
Thermal Conductivity
0,0002598 W/cm·K
Oxidation States
-3, -2, -1, 1, 2, 3, 4, 5
Applications
Nitrogen is used to produce ammonia and fertilizers, vital for current food production methods.

Liquid nitrogen is used as a refrigerant.

Nitric acid is used as an oxidizing agent in liquid fueled rockets.

Nitrogen is a constituent of molecules in every major drug class in pharmacology and medicine.
Rapid release of nitrogen gas into an enclosed space can displace oxygen, and therefore represents an asphyxiation hazard
Isotopes
Stable Isotopes
14N, 15N
Unstable Isotopes
10N, 11N, 12N, 13N, 16N, 17N, 18N, 19N, 20N, 21N, 22N, 23N, 24N, 25N