Fluorine, the most reactive chemical element and the lightest member of the halogen elements. Melting point The temperature at which the solid–liquid phase change occurs. Boiling point The temperature at which the liquid–gas phase change occurs. The substance fluorine has the following properties: normal melting point: 53.5 K normal boiling point: 85.0 K triple point: 1.6 times 10^-4 atm. Re: why is the melting point of fluorine less than that of oxygen? During the distillation calcium sulfate (CaSO4) is formed, which is insoluble in HF. 9 years ago. Until World War II, there was no commercial production of elemental fluorine. Fluorine is the 13th most abundant element in the crust of the Earth: The Earth’s crust contains 950 parts per million of fluorine. In the manufacture of hydrogen fluoride (HF), powdered fluorspar is distilled with concentrated sulfuric acid in a lead or cast-iron apparatus. About Fluorine. Fluorine is the most electronegative and reactive of all elements. ... Fluorine is the most reactive of all elements and no chemical substance is capable of freeing fluorine from any of its compounds. 2 Answers. Melting Point: 53.53 K (-219.62°C or -363.32°F) Boiling Point: 85.03 K (-188.12°C or -306.62°F) Density: 0.001696 grams per cubic centimeter. It is a pale yellow, corrosive gas, which reacts with most organic and inorganic substances. Fluorine - Fluorine - Production and use: Fluorspar is the most important source of fluorine. 55 atm, 144.1 K A sample of fluorine at a pressure of 1.00 atm and a temperature of 88.4 K is cooled at constant pressure to … 53.4 K critical point. Relevance. Date: Mon Mar 30 08:45:50 2009 Posted By: Cesar Prado-Fdez, Secondary School Teacher, Science Area of science: Chemistry ID: 1235582835.Ch Explaining the trends in melting point and boiling point When fluorine bonds with hydrogen, the polarity is so strong that it begins to exhibit the property of hydrogen bonding, which is in concentrate just an excessive dipole. Answer Save. Finely divided metals, glass, ceramics, carbon, and even water burn in fluorine with a bright flame. Though its primary ore, fluorite, has long been used in smelting to reduce the melting point of metal ores, fluorine was the last of the halogens to be isolated. Through wind-blown soil, fluorides are released into the air. Favorite Answer. Fluorine occurs naturally in the crust of the earth where it is present in rocks, coal, and clay. Why fluorine has low melting point? Because the intermolecular forces between fluorine molecules are Van der Waals forces (also known as London forces or induced dipole - dipole interactions) which are the weakest type intermolecular forces. Melting and boiling points increase down the group. Properties: Fluorine has a melting point of -219.62°C (1 atm), boiling point of -188.14°C (1 atm), density of 1.696 g/l (0°C, 1 atm), specific gravity of liquid of 1.108 at its boiling point, and valence of 1.Fluorine is a corrosive pale yellow gas. Its chemical activity can be attributed to its extreme ability to attract electrons (it is the most electronegative element) and to the small size of its atoms. As indicated by the graph above, fluorine and chlorine are gases at room temperature, bromine is a liquid and iodine a solid. Anonymous. Melting and Boiling points of Hydrogen Fluoride (HF) are higher than Hydrochloric acid (HCl), Hydrobromic acid (HBr) and Hydrogen iodide (HI).. Fluorine has the highest electronegativity of an atom. ... Fluorine's special status also stems from the 'fluorine factor', the ability of this little atom to fine-tune the chemical properties of an entire molecule. It is highly reactive, participating in reactions with virtually all organic and inorganic substances. ... melting point −219.62 °C (−363.32 °F) boiling point …
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