| Fluorine |
| | |  |
| Atomic Number - | 9 | Melting Point (°C,°F) - | -219.62 °C, -363.32 °F |
| Atomic Symbol - | F | Boiling Point (°C,°F) - | -188.12 °C, -306.62 °F |
| Atomic Mass - | 19.00 | Electron Configuration - | 1s2 2s2 2p5 |
| Group - | 17 | Electrons Per Shell - | 2, 7 |
| Period - | 2 | Protons - | 9 |
| Series - | Halogens | Neutrons - | 10 |
| Block - | p-block | | |
| | |
|
Element Description - Fluorine (from L. fluere, meaning "to flow"), is the chemical element in the periodic table that has the symbol F and atomic number 9. Atomic fluorine is univalent and is the most chemically reactive and electronegative of all the elements. In its pure form, it is a poisonous, pale, yellow-green gas, with chemical formula F2. Like other halogens, molecular fluorine is highly dangerous; it causes severe chemical burns on contact with skin. |
Element Characteristics - Pure fluorine (F2) is a corrosive pale yellow gas that is a powerful oxidizing agent. It is the most reactive and electronegative of all the elements, and readily forms compounds with most other elements. Fluorine even combines with the noble gases krypton, xenon, and radon. Even in dark, cool conditions, fluorine reacts explosively with hydrogen. It is so reactive that glass, metals, and even water, as well as other substances, burn with a bright flame in a jet of fluorine gas. It is far too reactive to be found in elemental form and has such an affinity for most elements, including silicon, that it can neither be prepared nor should be kept in glass vessels. In moist air it reacts with water to form the equally dangerous hydrofluoric acid.
In aqueous solution, fluorine commonly occurs as the fluoride ion F-. Other forms are fluoro-complexes, such as [FeF4]-, or H2F+.
Fluorides are compounds that combine fluoride with some positively charged counterpart. They often consist of ions. Fluorine compounds with metals are among the most stable of salts. |
| |
|
|
|
