Fluor

9
F
Gruppe
17
Periode
2
Blok
p
Protons
Electrons
Neutrons
9
9
10
General Properties
Atomnummer
9
Atommasse
18,9984032
Mass Number
19
Kategori
Halogener
Farve
Colorless
Radioactive
Nej
From the Latin and French fluere, flow or flux
Krystalstruktur
Endecentreret Monoklin
History
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.
Elektroner i hver skal
2, 7
Elektronkonfiguration
[He] 2s2 2p5
F
Fluorine reacts violently with water to produce oxygen
Physical Properties
Tilstandsform
Gas
Massefylde
0,001696 g/cm3
Smeltepunkt
53,53 K | -219,62 °C | -363,32 °F
Kogepunkt
85,03 K | -188,12 °C | -306,62 °F
Smeltevarme
0,26 kJ/mol
Fordampningsvarme
3,27 kJ/mol
Varmefylde
0,824 J/g·K
Abundance in Earth's crust
0,054%
Abundance in Universe
0,00004%
Fluorine
Billede akkrediteringer: Images-of-elements
Fluorine gas, but only as photomontage, because fluorine reacts even with glass
CAS Number
7782-41-4
PubChem CID Number
24524
Atomic Properties
Atomradius
42 pm
Kovalent radius
64 pm
Elektronegativitet
3,98 (Paulings skala)
Ionization Potential
17,4228 eV
Atomic Volume
17,1 cm3/mol
Varmeledningsevne
0,000279 W/cm·K
Oxidationstrin
-1
Applications
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
Isotoper
Stable Isotopes
19F
Unstable Isotopes
14F, 15F, 16F, 17F, 18F, 20F, 21F, 22F, 23F, 24F, 25F, 26F, 27F, 28F, 29F, 30F, 31F