Properties

CAS Number7440-68-8
PubChem CIDna
Atomic Radius-
Atomic Volume30
Atomic Weight[210]
Blockp
Boiling Point337
Bulk Modulus
CategoryHalogens
Crystal Structure
ColorSilver
Covalent Radius150
Density7
Electrical Resistivity
Electron Configuration[Xe] 4f14 5d10 6s2 6p5
Electrons per shell2, 8, 18, 32, 18, 7
Electronegativity2.2
Electrons85
Group17
Heat of Fusion6
Heat of Vaporization40
Ionization Potential9.3
Magnetic Ordering
Magnetic Susceptibility
Mass[210]
Mass Number85
Melting Point302
NameAstatu
Neutrons125
Atomic Number210
Oxidation States-1, 1, 3, 5, 7
Period6
PhaseSolid
Poisson Ratio
Protons85
Shear Modulus
Specific Heat Capacity-
SymbolAt
Thermal Conductivity0.017
Van der Waals radius
Young's Modulus
Abundance
Abundance in Earth's crustna
Abundance in Universena
At Astatu 85 (210) 17 6 p 85 302.0 337.0 [Xe] 4f14 5d10 6s2 6p5 2 8 18 32 18 7 None Silver Unknown 2.2 2.39 {"1":"890"} 920 270.1 142 1.45 12.0 30.0 1.7 1 8.06 h 11.7h BetaPlusDecay Solid, Halogen, Radioactive, Synthetic, Nonmetal AS-teh-teen Unstable, radioactive member of the halogen group. Since its isotopes have such short half-lives there are no commercially significant compounds of astatine. Does not occur in nature. Similar to iodine. Produced by bombarding bismuth with alpha particles. sSL7EwdlLlE Astatine
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. From the Latin word nitrum, Greek Nitron, native soda; and genes, forming 85 1940 Dale Corson, MacKenzie, Segre California, USA From the Greek word "astatos" meaning "unstable"

Isotopes of Nitrogen

Standard Atomic Weight

[210]

Stable Isotopes

Unstable Isotopes

193At 194At 195At 196At 197At 198At 199At 200At 201At 202At 203At 204At 205At 206At 207At 208At 209At 210At 211At 212At 213At 214At 215At 216At 217At 218At 219At 220At 221At 222At 223At

Rapid release of nitrogen gas into an enclosed space can displace oxygen, and therefore represents an asphyxiation hazard
Nitrogen is present in all living organisms, in proteins, nucleic acids and other molecules
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.