Nitrogen
Main page |
| Other names/abbreviations: | N |
| Element no: | 7 |
| Element group: | 15 (IUPAC) V A (American labelling) V B (European labelling) Pnictogens |
| Element type: | Nonmetals |
| CAS-Number: | 7727-37-9 |
| EINECS-Number: | 231-783-9 |
Safety
Symbol: -R-phrases: -
S-phrases: -
Physical properties
Appearance | ||
| Physical state @ 20°C: | Gas [2] | |
| Color: | Colourless [2] | |
| Odor: | Odourless [2] | |
Bulk properties | ||
| Molecular weight (g/mol): | 14.00674(7) [1] | |
| Melting point (°C): | -210.0 [1] | |
| Boiling point (°C): | -195.8 [1] | |
| Density (g/cm3): | 0.879 (liquid) [1] | |
Thermodynamic properties | ||
| ΔfH°gas (kJ/mol): | 472.7 (monoatomic) [3] 0.0 (N2) [3] | |
| ΔH°fusion (kJ/mol): | 0.71 (N2) [3] | |
| ΔH°vaporization (kJ/mol): | 2.79 (per mole N atoms) | |
| S°gas (J/K·mol): | 153.3 (monoatomic) [3] 191.6 (N2) [3] | |
| ΔfG°gas (kJ/mol): | 455.5 (monoatomic) [3] | |
| Cp (gas) (J/K·mol): | 20.8 (monoatomic, 25 °C) [3] 29.124 (N2, 25 °C) [3] | |
| Critical temperature (°C): | -146.94 [3] | |
Electronic properties | ||
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Electron configuration: | 1s2-2s2-2p3 |
| Ionic radius (Å): | N(III): 0.16 [1] N(V): 0.13 [1] | |
References
1: Greenwood,N.N., Earnshaw,A. Chemistry of the elements2nd edition (1997) Edited by Greenwood,N.N., Earnshaw,A. pp. 1-1340, Butterworth-Heinemann. Oxford. Great Britain
2: Merck. ChemDAT The Merck Chemical Database Ver. 1.1.5
3: CRC Handbook of Chemistry and Physics
75th edition (1994) Edited by Lide,D.R. , CRC Press Inc. Boca Raton, USA
© Michael Pilgaard
Created: October 3, 2008
Last update: October 9, 2008