Fluor

9
F
Gruppe
17
Periode
2
Block
p
Protonen
Elektronen
Neutronen
9
9
10
Generelle Eigenschaften
Ordnungszahl
9
Atommasse
18,9984032
Massenzahl
19
Kategorie
Halogene
Farbe
Farblos
Radioaktiv
Nein
Aus dem Lateinischen und Französischen fluere (Fließen oder Fluss)
Kristallstruktur
Moniklin basiszentriert
Geschichte
In 1529, Georigius Agricola described the use of fluorspar as a flux.

In 1670 Heinrich Schwandhard found that glass was etched when exposed to fluorspar treated with acid.

In 1810, French scientist Andre-Marie Ampere proposed that fluoric acid was a compound of hydrogen with a new element.

The element was finally isolated in 1886 by Henri Moissan.
Elektronen pro Schale
2, 7
Elektronenkonfiguration
[He] 2s2 2p5
F
Fluorine reacts violently with water to produce oxygen
Physikalische Eigenschaften
Aggregatzustand
Gasförmig
Dichte
0,001696 g/cm3
Schmelzpunkt
53,53 K | -219,62 °C | -363,32 °F
Siedepunkt
85,03 K | -188,12 °C | -306,62 °F
Schmelzwärme
0,26 kJ/mol
Verdampfungswärme
3,27 kJ/mol
Spezifische Wärmekapazität
0,824 J/g·K
Häufigkeit in der Erdkruste
0,054%
Häufigkeit im Universum
0,00004%
Fluorine
Danksagungen für Bilder: Images-of-elements
Fluorine gas, but only as photomontage, because fluorine reacts even with glass
CAS-Nummer
7782-41-4
PubChem CID Number
24524
Atomeigenschaften
Atomradius
42 pm
Kovalenter Radius
64 pm
Elektronegativität
3,98 (Pauling-Skala)
Ionisierungsenergie
17,4228 eV
Molares Volumen
17,1 cm3/mol
Wärmeleitfähigkeit
0,000279 W/cm·K
Oxidationszustände
-1
Anwendung
Compounds of fluorine, including sodium fluoride, are used in toothpaste and in drinking water to prevent dental cavities.

Hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) now serve as replacements for CFC refrigerants.

Fluorine and its compounds are used in processing nuclear fuel.
Fluorine is highly toxic and corrosive
Isotope
Stabile Isotope
19F
Instabile Isotope
14F, 15F, 16F, 17F, 18F, 20F, 21F, 22F, 23F, 24F, 25F, 26F, 27F, 28F, 29F, 30F, 31F