Nitrogen

Chemical, physical and material properties and data of the chemical element Nitrogen.

Contents

General Information about Nitrogen

Regular nameNitrogenChemical symbolNOther namesHistorical namesName meaning, originDiscovery (year)OccurencePosition in the PSEGroup membership

Atomar Properties of Nitrogen

Atomic number Z7 = number of protonsStandard Atomic Weight14.007
intervall: [14.00643, 14.00728]

Electron configuration of Nitrogen

1s	2s	2p	3s	3p	3d	4s	4p	4d	4f	5s	5p	5d	5f	6s	6p	6d	6f	7s	7p
2	2	3

Shorthand electron configuration of Nitrogen: [He] 2s² 2p³ .

Ionization Energies of Nitrogen

The following table lists the ionization energies IE (ionization potentials); the IE is the energy required in electron volt (eV) per atom to separate a given electron from an Nitrogen atom.

IE1	IE2	IE3	IE4	IE5	IE6	IE7
14.5341	29.6013	47.44924	77.4735	97.8902	552.0718	667.046

Isotopic Data of Nitrogen

An overview of the nuclides as well as the isotopic data and properties are listed on the following page: Nitrogen isotopes.

Chemistry of Nitrogen

Oxidation states-3. +3. +5Electronegativity3.0 (Pauling original)
3.04 (Pauling)
3.066 (Allen)
2.9 (Mulliken)
2.93 (Sanderson)
3.07 (Allred-Rochow)
7.4964 eV (Gosh Gupta)
7.30 eV (Pearson)Electron affinity-0.07 eV
-6.8 kJ mol^-1

Standard Electrode Potential

E⁰ (V)	Symbol	N_ox	Name Ox. Name Red.	Ox. Red.	e^-
-3.09	N	0 - III	Nitrogen Hydrazoic acid	3/2 N₂ (g) + H⁺ ⇄ HN₃ (g)	+ e^-
-3.04	N	0 - I	Nitrogen Hydroxylamine	N₂ (g) + 4 H₂ ⇄ 2 NH₂OH + 2 OH^-	+ 2 e^-
0.092	N	0 - III	Nitrogen Ammonium hydroxide	N₂ (g) + 2 H₂O (aq) ⇄ 2 NH₄OH (aq)	+ 6 e^-
0.11	N	- II - III	Hydrazine Ammonium cation	N2H4 (aq) + 4 H₂O ⇄ 2 NH₄⁺ + 4 OH^-	+ 2 e^-
0.8	N	+ V + IV	Nitrate anion Nitrogen dioxide	NO₃^- (aq) + 2 H⁺ (aq) ⇄ NO₂ (g) + H₂O (aq)	+ e^-
1.42	N	- I - II	Hydroxylammonium ion Hydrazinium ion	2NH₃OH⁺ + H⁺ ⇄ N₂H₅⁺ + 2 H₂O	+ 2 e^-

Material and Physical Properties

Melting point-210.00 °CEnthalpy of fusion (molar)0.720 kJ mol^-1Boiling point-195.795 °CEnthalpy of vaporization5.577 kJ mol^-1Density1.2506 g L ^-1 (0°C; 101.325 kPa. N₂)

External Data, Identifiers

CAS registry number7727-37-9InChI =1S/NInChIKeyQJGQUHMNIGDVPM-UHFFFAOYSA-NPubChem ID947

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Last update: 2022-12-12

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