Atomic NumberAtomic Number of Fluorine
Atomic Number of Fluorine is 9.
Chemical symbol for Fluorine is F. Number of protons in Fluorine is 9. Atomic weight of Fluorine is 18.99840316 u or g/mol. Melting point of Fluorine is -219,6 °C and its the boiling point is -188,1 °C.
» Boiling Point » Melting Point » Abundant » State at STP » Discovery YearAbout Fluorine
Fluorine is a pale yellow gas which is very toxic and poisonous but is essential for animals and humans to strengthen our bones and teeth. It is a very reactive gas which reacts even with noble gases, and it forms a large number of chemical compounds. The name of the chemical element is derived from the Greek word meaning flowing. Fluorine can not be found in its natural form as it reacts very fast. It was not produced until the middle of the 20th century, but in those times it became necessary for various projects involving nuclear energy. This element is also used in toothpaste and dental care products, as well as in producing some parts for electronic devices, for welding and processing glass, etc. In its natural form, fluorine exists in some types of clay, rocks, coal, and other sources.
Uses of Fluorine
Fluorine which is the most reactive element is used to produce uranium hexafluoride in the nuclear power industry. Today, fluorine compounds are mostly used in the pharmaceutical and agriculture fields. Dichlorodifluoromethane (a colorless gas with the formula Cl2CF2) is used as a coolant in domestic refrigerators and air conditioners. And hydrofluoroalkane (HFA) containing carbon, fluorine, and hydrogen, is used as aerosols in medicine. Hydrofluoric acid (HF) which is a solution of hydrogen fluoride in water, is used in industrial chemistry, glass finishing, cleaning, and research. Sodium fluoride, an inorganic compound with the formula NaF is commonly used in the production of pharmaceuticals. It is sold as tablets to prevent cavities. Sodium fluoride is also used in chemistry and in medical imaging too.
Compounds with Fluorine
- HF: Hydrogen fluoride
- H2SiF6: Fluorosilicic acid
- Na3AlF6: Sodium aluminum fluoride
- SF6: Sulfur hexafluoride
- ClF3: Chlorine trifluoride
- CoF3: Cobalt trifluoride
- Cl2CF2: Dichlorodifluoromethane
- BF3: Boron trifluoride
- HFA: Hydrofluoroalkane
Properties of Fluorine Element
| Atomic Number (Z) | 9 |
|---|---|
| Atomic Symbol | F |
| Group | 17 |
| Period | 2 |
| Atomic Weight | 18.99840316 u |
| Density | 0.001696 g/cm3 |
| Melting Point (K) | 53.53 K |
| Melting Point (℃) | -219,6 °C |
| Boiling Point (K) | 85.03 K |
| Boiling Point (℃) | -188,1 °C |
| Heat Capacity | 0.824 J/g · K |
| Abundance | 585 mg/kg |
| State at STP | Gas |
| Occurrence | Primordial |
| Description | Halogen |
| Electronegativity (Pauling) χ | 3.98 |
| Ionization Energy (eV) | 17.42282 |
| Atomic Radius | 50pm |
| Covalent Radius | 71pm |
| Van der Waals Radius | 147 |
| Valence Electrons | 7 |
| Year of Discovery | 1886 |
| Discoverer | Moissan |