Elements
9

F

Fluorine

Fluorine (F) exists as a pale yellow gas with a pungent smell. It has the atomic number 9 in the periodic table and belongs in Group 17, the Halogens. It is a non metal with the symbol F.

Fluorine is a halogen gas located in Group 17 and has a wide number of uses due to its high reactivity. It is used in Toothpaste and antiseptics and widely used in the treatment of water to kill bacteria. Fluorine is the most reactive element in the periodic table due to its unique small nucleus and relatively low number of shells and electrons. It is highly corrosive and toxic to humans and has a very pungent odour. Fluorine was first used in 1530 by the German scientist Georgisu Agricola who used the mineral Fluorspar, more commonly known as Calcium Fluoride to extract metals from their ores. It was not until 1813 that the scientist Humphry Davy isolated Fluorine in the lab after collaborating with a number of scientists on Hydrofluoric acid. It is located in Group 17, the Halogens. It is a non metallic diatomic yellow gas at room temperature and it has a melting point of -219°c and a boiling point of -188°c.

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FAQ's

What is the Melting Point for Fluorine?

Fluorine has a Melting Point of -219.62°F, meaning at -219.62°F it will turn to a liquid.

What is the Boiling Point for Fluorine?

Fluorine has a Boiling Point of -188°F, meaning at -188°F it will turn to a Gas.

What is the Electronegativity of Fluorine?

Fluorine's Electronegativty is 3.98. Electronegativity is a measure of how strongly atoms attract bonding electrons to themselves.

What is the Heat of Vaporization of Fluorine?

Fluorine has a Heat of Vaporization of 3.2698 kJ/mol.

Uses

Used in refrigerants and other fluorocarbons. Also in toothpaste as sodium fluoride (NaF) and stannous fluoride (SnF2); also in Teflon.

Sources

Found in the minerals fluorite (CaF2) and cryolite(Na3AlF6). Electrolysis of hydrofluoric acid (HF) or potassium acid fluoride (KHF2) is the only practical method of commercial production.

9
Protons
9
Electrons
10
Neutrons

F

Element Symbol
F
Atomic Weight
18.998
Atomic Number
9
State
Gas
Melting Point
Unknown
-219.62
°C
Boiling Point
-188
Unknown
°C
Heat of Vaporization
3.2698
Unknown
kJ/mol
Crystal Structure
Cubic
Thermoconductivity
0.000279
Unknown
W/cmK
Shells
2,7
Group
Halogen
Period
2
Block
P Block
Orbitals
[He] 2s2 2p5
Coefficient of Thermal Expansion
1800 10^-6 K^-1
Covalent Radius
0.72 Å
Density at 293K
0.001696 g/cm³
Electrical Conductivity
--
First Ionization Potential
17.4228 V
Second Ionization Potential
34.97 V
Third Ionization Potential
62.707 V
Ionic Radius
1.33 (-1) Å
Oxydation States
-1
Lattice Parameter
--
Lattice Parameter 2
--
Lattice Parameter 3
5.2107 Å
Pronounced

FLU-eh-reen

Discovered by

Henri Moissan

Discovery date

1886

Orbital configuration
2,7

Download the Periodic Table

Explore Other Halogens

210
85

At

Astatine
79.904
35

Br

Bromine
35.453
17

Cl

Chlorine
126.904
53

I

Iodine
The halogens are located in group 17 (formally known as group VIIA) on the left of the noble gases on the periodic table. These five toxic, non-metallic elements make up group 17 and consist of: fluorine (F), chlorine (Cl), bromine (Br), iodine (I) and astatine (As).
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