Fluorine
Main page |
| Other names/abbreviations: | F |
| Element no: | 9 |
| Element group: | 17 (IUPAC) VII A (American labelling) VII B (European labelling) Halogens |
| Element type: | Nonmetals |
| CAS-Number: | 7782-41-4 |
| EINECS-Number: | 231-954-8 |
Physical properties
Appearance | ||
| Physical state @ 20°C: | Gas [1] | |
| Color: | Gas: Pale yellow [1] Liquid: Canary yellow [1] | |
Bulk properties | ||
| Molecular weight (g/mol): | 18.9984032(9) [1] | |
| Melting point (°C): | -219.62 [2] | |
| Boiling point (°C): | -188.12 [2] | |
Thermodynamic properties | ||
| ΔfH°gas (kJ/mol): | 79.4 (monoatomic) [2] 0.0 (F2) [2] | |
| ΔH°fusion (kJ/mol): | 0.51 (F2) [2] | |
| ΔH°vaporization (kJ/mol): | 3.27 (per mole F atoms) | |
| S°gas (J/K·mol): | 158.8 (monoatomic) [2] 202.8 (F2) [2] | |
| ΔfG°gas (kJ/mol): | 62.3 (monoatomic) [2] | |
| Cp (gas) (J/K·mol): | 22.7 (monoatomic, 25 °C) [2] 31.304 (F2, 25 °C) [2] | |
| Critical temperature (°C): | -129.02 [2] | |
Electronic properties | ||
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Electron configuration: | 1s2-2s2-2p5 |
| Ionic radius (Å): | F(-I) 1.33 (coordination number 6) [2] | |
| Electron affinity [M-M-] (kJ/mol): | 332.6 [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: CRC Handbook of Chemistry and Physics
75th edition (1994) Edited by Lide,D.R. , CRC Press Inc. Boca Raton, USA
© Michael Pilgaard
Created: September 29, 2008